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alsa-2026:1472
Vulnerability from osv_almalinux
Published
2026-01-28 00:00
Modified
2026-01-28 19:58
Summary
Important: openssl security update
Details
OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.
Security Fix(es):
- openssl: OpenSSL: Arbitrary code execution or denial of service through crafted PKCS#12 file (CVE-2025-11187)
- openssl: OpenSSL: Remote code execution or Denial of Service via oversized Initialization Vector in CMS parsing (CVE-2025-15467)
- openssl: OpenSSL: Denial of Service via NULL pointer dereference in QUIC protocol handling (CVE-2025-15468)
- openssl: OpenSSL: Data integrity bypass in
openssl dgstcommand due to silent truncation (CVE-2025-15469) - openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression (CVE-2025-66199)
- openssl: OpenSSL: Denial of Service due to out-of-bounds write in BIO filter (CVE-2025-68160)
- openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls (CVE-2025-69418)
- openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing (CVE-2025-69419)
- openssl: OpenSSL: Denial of Service via malformed PKCS#12 file processing (CVE-2025-69421)
- openssl: OpenSSL: Denial of Service via malformed TimeStamp Response (CVE-2025-69420)
- openssl: OpenSSL: Denial of Service due to type confusion in PKCS#12 file processing (CVE-2026-22795)
- openssl: OpenSSL: Denial of Service via type confusion in PKCS#7 signature verification (CVE-2026-22796)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
{
"affected": [
{
"package": {
"ecosystem": "AlmaLinux:10",
"name": "openssl"
},
"ranges": [
{
"events": [
{
"introduced": "0"
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{
"fixed": "1:3.5.1-7.el10_1.alma.1"
}
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"type": "ECOSYSTEM"
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{
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"details": "OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. \n\nSecurity Fix(es): \n\n * openssl: OpenSSL: Arbitrary code execution or denial of service through crafted PKCS#12 file (CVE-2025-11187)\n * openssl: OpenSSL: Remote code execution or Denial of Service via oversized Initialization Vector in CMS parsing (CVE-2025-15467)\n * openssl: OpenSSL: Denial of Service via NULL pointer dereference in QUIC protocol handling (CVE-2025-15468)\n * openssl: OpenSSL: Data integrity bypass in `openssl dgst` command due to silent truncation (CVE-2025-15469)\n * openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression (CVE-2025-66199)\n * openssl: OpenSSL: Denial of Service due to out-of-bounds write in BIO filter (CVE-2025-68160)\n * openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls (CVE-2025-69418)\n * openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing (CVE-2025-69419)\n * openssl: OpenSSL: Denial of Service via malformed PKCS#12 file processing (CVE-2025-69421)\n * openssl: OpenSSL: Denial of Service via malformed TimeStamp Response (CVE-2025-69420)\n * openssl: OpenSSL: Denial of Service due to type confusion in PKCS#12 file processing (CVE-2026-22795)\n * openssl: OpenSSL: Denial of Service via type confusion in PKCS#7 signature verification (CVE-2026-22796)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
"id": "ALSA-2026:1472",
"modified": "2026-01-28T19:58:47Z",
"published": "2026-01-28T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:1472"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-11187"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-15467"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-15468"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-15469"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-66199"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-68160"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-69418"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-69419"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-69420"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-69421"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-22795"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-22796"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430375"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430376"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430377"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430378"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430379"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430380"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430381"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430386"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430387"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430388"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430389"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2430390"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/10/ALSA-2026-1472.html"
}
],
"related": [
"CVE-2025-11187",
"CVE-2025-15467",
"CVE-2025-15468",
"CVE-2025-15469",
"CVE-2025-66199",
"CVE-2025-68160",
"CVE-2025-69418",
"CVE-2025-69419",
"CVE-2025-69421",
"CVE-2025-69420",
"CVE-2026-22795",
"CVE-2026-22796"
],
"summary": "Important: openssl security update"
}
CVE-2025-15468 (GCVE-0-2025-15468)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 14:53
VLAI?
EPSS
Title
NULL dereference in SSL_CIPHER_find() function on unknown cipher ID
Summary
Issue summary: If an application using the SSL_CIPHER_find() function in
a QUIC protocol client or server receives an unknown cipher suite from
the peer, a NULL dereference occurs.
Impact summary: A NULL pointer dereference leads to abnormal termination of
the running process causing Denial of Service.
Some applications call SSL_CIPHER_find() from the client_hello_cb callback
on the cipher ID received from the peer. If this is done with an SSL object
implementing the QUIC protocol, NULL pointer dereference will happen if
the examined cipher ID is unknown or unsupported.
As it is not very common to call this function in applications using the QUIC
protocol and the worst outcome is Denial of Service, the issue was assessed
as Low severity.
The vulnerable code was introduced in the 3.2 version with the addition
of the QUIC protocol support.
The FIPS modules in 3.6, 3.5, 3.4 and 3.3 are not affected by this issue,
as the QUIC implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4 and 3.3 are vulnerable to this issue.
OpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
Severity ?
No CVSS data available.
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
Credits
Stanislav Fort (Aisle Research)
Stanislav Fort (Aisle Research)
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CVE-2026-22795 (GCVE-0-2026-22795)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 18:13
VLAI?
EPSS
Title
Missing ASN1_TYPE validation in PKCS#12 parsing
Summary
Issue summary: An invalid or NULL pointer dereference can happen in
an application processing a malformed PKCS#12 file.
Impact summary: An application processing a malformed PKCS#12 file can be
caused to dereference an invalid or NULL pointer on memory read, resulting
in a Denial of Service.
A type confusion vulnerability exists in PKCS#12 parsing code where
an ASN1_TYPE union member is accessed without first validating the type,
causing an invalid pointer read.
The location is constrained to a 1-byte address space, meaning any
attempted pointer manipulation can only target addresses between 0x00 and 0xFF.
This range corresponds to the zero page, which is unmapped on most modern
operating systems and will reliably result in a crash, leading only to a
Denial of Service. Exploiting this issue also requires a user or application
to process a maliciously crafted PKCS#12 file. It is uncommon to accept
untrusted PKCS#12 files in applications as they are usually used to store
private keys which are trusted by definition. For these reasons, the issue
was assessed as Low severity.
The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,
as the PKCS12 implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.
OpenSSL 1.0.2 is not affected by this issue.
Severity ?
No CVSS data available.
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
Impacted products
Credits
Luigino Camastra (Aisle Research)
Bob Beck
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CVE-2026-22796 (GCVE-0-2026-22796)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-27 16:28
VLAI?
EPSS
Title
ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function
Summary
Issue summary: A type confusion vulnerability exists in the signature
verification of signed PKCS#7 data where an ASN1_TYPE union member is
accessed without first validating the type, causing an invalid or NULL
pointer dereference when processing malformed PKCS#7 data.
Impact summary: An application performing signature verification of PKCS#7
data or calling directly the PKCS7_digest_from_attributes() function can be
caused to dereference an invalid or NULL pointer when reading, resulting in
a Denial of Service.
The function PKCS7_digest_from_attributes() accesses the message digest attribute
value without validating its type. When the type is not V_ASN1_OCTET_STRING,
this results in accessing invalid memory through the ASN1_TYPE union, causing
a crash.
Exploiting this vulnerability requires an attacker to provide a malformed
signed PKCS#7 to an application that verifies it. The impact of the
exploit is just a Denial of Service, the PKCS7 API is legacy and applications
should be using the CMS API instead. For these reasons the issue was
assessed as Low severity.
The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,
as the PKCS#7 parsing implementation is outside the OpenSSL FIPS module
boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.
Severity ?
No CVSS data available.
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
Credits
Luigino Camastra (Aisle Research)
Bob Beck
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CVE-2025-68160 (GCVE-0-2025-68160)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 15:06
VLAI?
EPSS
Title
Heap out-of-bounds write in BIO_f_linebuffer on short writes
Summary
Issue summary: Writing large, newline-free data into a BIO chain using the
line-buffering filter where the next BIO performs short writes can trigger
a heap-based out-of-bounds write.
Impact summary: This out-of-bounds write can cause memory corruption which
typically results in a crash, leading to Denial of Service for an application.
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TLS/SSL data paths. In OpenSSL command-line applications, it is typically
only pushed onto stdout/stderr on VMS systems. Third-party applications that
explicitly use this filter with a BIO chain that can short-write and that
write large, newline-free data influenced by an attacker would be affected.
However, the circumstances where this could happen are unlikely to be under
attacker control, and BIO_f_linebuffer is unlikely to be handling non-curated
data controlled by an attacker. For that reason the issue was assessed as
Low severity.
The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,
as the BIO implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.
Severity ?
No CVSS data available.
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
Credits
Petr Šimeček (Aisle Research)
Stanislav Fort (Aisle Research)
Stanislav Fort (Aisle Research)
Neil Horman
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CVE-2025-69420 (GCVE-0-2025-69420)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-28 19:33
VLAI?
EPSS
Title
Missing ASN1_TYPE validation in TS_RESP_verify_response() function
Summary
Issue summary: A type confusion vulnerability exists in the TimeStamp Response
verification code where an ASN1_TYPE union member is accessed without first
validating the type, causing an invalid or NULL pointer dereference when
processing a malformed TimeStamp Response file.
Impact summary: An application calling TS_RESP_verify_response() with a
malformed TimeStamp Response can be caused to dereference an invalid or
NULL pointer when reading, resulting in a Denial of Service.
The functions ossl_ess_get_signing_cert() and ossl_ess_get_signing_cert_v2()
access the signing cert attribute value without validating its type.
When the type is not V_ASN1_SEQUENCE, this results in accessing invalid memory
through the ASN1_TYPE union, causing a crash.
Exploiting this vulnerability requires an attacker to provide a malformed
TimeStamp Response to an application that verifies timestamp responses. The
TimeStamp protocol (RFC 3161) is not widely used and the impact of the
exploit is just a Denial of Service. For these reasons the issue was
assessed as Low severity.
The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,
as the TimeStamp Response implementation is outside the OpenSSL FIPS module
boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.
OpenSSL 1.0.2 is not affected by this issue.
Severity ?
No CVSS data available.
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
Credits
Luigino Camastra (Aisle Research)
Bob Beck
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CVE-2025-69421 (GCVE-0-2025-69421)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-28 15:19
VLAI?
EPSS
Title
NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function
Summary
Issue summary: Processing a malformed PKCS#12 file can trigger a NULL pointer
dereference in the PKCS12_item_decrypt_d2i_ex() function.
Impact summary: A NULL pointer dereference can trigger a crash which leads to
Denial of Service for an application processing PKCS#12 files.
The PKCS12_item_decrypt_d2i_ex() function does not check whether the oct
parameter is NULL before dereferencing it. When called from
PKCS12_unpack_p7encdata() with a malformed PKCS#12 file, this parameter can
be NULL, causing a crash. The vulnerability is limited to Denial of Service
and cannot be escalated to achieve code execution or memory disclosure.
Exploiting this issue requires an attacker to provide a malformed PKCS#12 file
to an application that processes it. For that reason the issue was assessed as
Low severity according to our Security Policy.
The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,
as the PKCS#12 implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.
Severity ?
No CVSS data available.
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
Credits
Luigino Camastra (Aisle Research)
Luigino Camastra (Aisle Research)
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CVE-2025-15467 (GCVE-0-2025-15467)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 14:50
VLAI?
EPSS
Title
Stack buffer overflow in CMS AuthEnvelopedData parsing
Summary
Issue summary: Parsing CMS AuthEnvelopedData message with maliciously
crafted AEAD parameters can trigger a stack buffer overflow.
Impact summary: A stack buffer overflow may lead to a crash, causing Denial
of Service, or potentially remote code execution.
When parsing CMS AuthEnvelopedData structures that use AEAD ciphers such as
AES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters is
copied into a fixed-size stack buffer without verifying that its length fits
the destination. An attacker can supply a crafted CMS message with an
oversized IV, causing a stack-based out-of-bounds write before any
authentication or tag verification occurs.
Applications and services that parse untrusted CMS or PKCS#7 content using
AEAD ciphers (e.g., S/MIME AuthEnvelopedData with AES-GCM) are vulnerable.
Because the overflow occurs prior to authentication, no valid key material
is required to trigger it. While exploitability to remote code execution
depends on platform and toolchain mitigations, the stack-based write
primitive represents a severe risk.
The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this
issue, as the CMS implementation is outside the OpenSSL FIPS module
boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3 and 3.0 are vulnerable to this issue.
OpenSSL 1.1.1 and 1.0.2 are not affected by this issue.
Severity ?
No CVSS data available.
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
Credits
Stanislav Fort (Aisle Research)
Igor Ustinov
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CVE-2025-69418 (GCVE-0-2025-69418)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 15:07
VLAI?
EPSS
Title
Unauthenticated/unencrypted trailing bytes with low-level OCB function calls
Summary
Issue summary: When using the low-level OCB API directly with AES-NI or<br>other hardware-accelerated code paths, inputs whose length is not a multiple<br>of 16 bytes can leave the final partial block unencrypted and unauthenticated.<br><br>Impact summary: The trailing 1-15 bytes of a message may be exposed in<br>cleartext on encryption and are not covered by the authentication tag,<br>allowing an attacker to read or tamper with those bytes without detection.<br><br>The low-level OCB encrypt and decrypt routines in the hardware-accelerated<br>stream path process full 16-byte blocks but do not advance the input/output<br>pointers. The subsequent tail-handling code then operates on the original<br>base pointers, effectively reprocessing the beginning of the buffer while<br>leaving the actual trailing bytes unprocessed. The authentication checksum<br>also excludes the true tail bytes.<br><br>However, typical OpenSSL consumers using EVP are not affected because the<br>higher-level EVP and provider OCB implementations split inputs so that full<br>blocks and trailing partial blocks are processed in separate calls, avoiding<br>the problematic code path. Additionally, TLS does not use OCB ciphersuites.<br>The vulnerability only affects applications that call the low-level<br>CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions directly with<br>non-block-aligned lengths in a single call on hardware-accelerated builds.<br>For these reasons the issue was assessed as Low severity.<br><br>The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected<br>by this issue, as OCB mode is not a FIPS-approved algorithm.<br><br>OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.<br><br>OpenSSL 1.0.2 is not affected by this issue.
Severity ?
No CVSS data available.
CWE
- CWE-325 - Missing Cryptographic Step
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
Credits
Stanislav Fort (Aisle Research)
Stanislav Fort (Aisle Research)
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CVE-2025-15469 (GCVE-0-2025-15469)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 14:54
VLAI?
EPSS
Title
'openssl dgst' one-shot codepath silently truncates inputs >16MB
Summary
Issue summary: The 'openssl dgst' command-line tool silently truncates input
data to 16MB when using one-shot signing algorithms and reports success instead
of an error.
Impact summary: A user signing or verifying files larger than 16MB with
one-shot algorithms (such as Ed25519, Ed448, or ML-DSA) may believe the entire
file is authenticated while trailing data beyond 16MB remains unauthenticated.
When the 'openssl dgst' command is used with algorithms that only support
one-shot signing (Ed25519, Ed448, ML-DSA-44, ML-DSA-65, ML-DSA-87), the input
is buffered with a 16MB limit. If the input exceeds this limit, the tool
silently truncates to the first 16MB and continues without signaling an error,
contrary to what the documentation states. This creates an integrity gap where
trailing bytes can be modified without detection if both signing and
verification are performed using the same affected codepath.
The issue affects only the command-line tool behavior. Verifiers that process
the full message using library APIs will reject the signature, so the risk
primarily affects workflows that both sign and verify with the affected
'openssl dgst' command. Streaming digest algorithms for 'openssl dgst' and
library users are unaffected.
The FIPS modules in 3.5 and 3.6 are not affected by this issue, as the
command-line tools are outside the OpenSSL FIPS module boundary.
OpenSSL 3.5 and 3.6 are vulnerable to this issue.
OpenSSL 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
Severity ?
No CVSS data available.
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
Credits
Stanislav Fort (Aisle Research)
Viktor Dukhovni
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CVE-2025-11187 (GCVE-0-2025-11187)
Vulnerability from cvelistv5 – Published: 2026-01-27 15:59 – Updated: 2026-01-29 14:48
VLAI?
EPSS
Title
Improper validation of PBMAC1 parameters in PKCS#12 MAC verification
Summary
Issue summary: PBMAC1 parameters in PKCS#12 files are missing validation
which can trigger a stack-based buffer overflow, invalid pointer or NULL
pointer dereference during MAC verification.
Impact summary: The stack buffer overflow or NULL pointer dereference may
cause a crash leading to Denial of Service for an application that parses
untrusted PKCS#12 files. The buffer overflow may also potentially enable
code execution depending on platform mitigations.
When verifying a PKCS#12 file that uses PBMAC1 for the MAC, the PBKDF2
salt and keylength parameters from the file are used without validation.
If the value of keylength exceeds the size of the fixed stack buffer used
for the derived key (64 bytes), the key derivation will overflow the buffer.
The overflow length is attacker-controlled. Also, if the salt parameter is
not an OCTET STRING type this can lead to invalid or NULL pointer
dereference.
Exploiting this issue requires a user or application to process
a maliciously crafted PKCS#12 file. It is uncommon to accept untrusted
PKCS#12 files in applications as they are usually used to store private
keys which are trusted by definition. For this reason the issue was assessed
as Moderate severity.
The FIPS modules in 3.6, 3.5 and 3.4 are not affected by this issue, as
PKCS#12 processing is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5 and 3.4 are vulnerable to this issue.
OpenSSL 3.3, 3.0, 1.1.1 and 1.0.2 are not affected by this issue as they do
not support PBMAC1 in PKCS#12.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Credits
Stanislav Fort (Aisle Research)
Petr Šimeček (Aisle Research)
Hamza (Metadust)
Tomáš Mráz
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CVE-2025-66199 (GCVE-0-2025-66199)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 15:03
VLAI?
EPSS
Title
TLS 1.3 CompressedCertificate excessive memory allocation
Summary
Issue summary: A TLS 1.3 connection using certificate compression can be
forced to allocate a large buffer before decompression without checking
against the configured certificate size limit.
Impact summary: An attacker can cause per-connection memory allocations of
up to approximately 22 MiB and extra CPU work, potentially leading to
service degradation or resource exhaustion (Denial of Service).
In affected configurations, the peer-supplied uncompressed certificate
length from a CompressedCertificate message is used to grow a heap buffer
prior to decompression. This length is not bounded by the max_cert_list
setting, which otherwise constrains certificate message sizes. An attacker
can exploit this to cause large per-connection allocations followed by
handshake failure. No memory corruption or information disclosure occurs.
This issue only affects builds where TLS 1.3 certificate compression is
compiled in (i.e., not OPENSSL_NO_COMP_ALG) and at least one compression
algorithm (brotli, zlib, or zstd) is available, and where the compression
extension is negotiated. Both clients receiving a server CompressedCertificate
and servers in mutual TLS scenarios receiving a client CompressedCertificate
are affected. Servers that do not request client certificates are not
vulnerable to client-initiated attacks.
Users can mitigate this issue by setting SSL_OP_NO_RX_CERTIFICATE_COMPRESSION
to disable receiving compressed certificates.
The FIPS modules in 3.6, 3.5, 3.4 and 3.3 are not affected by this issue,
as the TLS implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4 and 3.3 are vulnerable to this issue.
OpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
Severity ?
No CVSS data available.
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
Credits
Tomas Dulka (Aisle Research)
Stanislav Fort (Aisle Research)
Tomas Dulka (Aisle Research)
Stanislav Fort (Aisle Research)
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CVE-2025-69419 (GCVE-0-2025-69419)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 15:09
VLAI?
EPSS
Title
Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion
Summary
Issue summary: Calling PKCS12_get_friendlyname() function on a maliciously
crafted PKCS#12 file with a BMPString (UTF-16BE) friendly name containing
non-ASCII BMP code point can trigger a one byte write before the allocated
buffer.
Impact summary: The out-of-bounds write can cause a memory corruption
which can have various consequences including a Denial of Service.
The OPENSSL_uni2utf8() function performs a two-pass conversion of a PKCS#12
BMPString (UTF-16BE) to UTF-8. In the second pass, when emitting UTF-8 bytes,
the helper function bmp_to_utf8() incorrectly forwards the remaining UTF-16
source byte count as the destination buffer capacity to UTF8_putc(). For BMP
code points above U+07FF, UTF-8 requires three bytes, but the forwarded
capacity can be just two bytes. UTF8_putc() then returns -1, and this negative
value is added to the output length without validation, causing the
length to become negative. The subsequent trailing NUL byte is then written
at a negative offset, causing write outside of heap allocated buffer.
The vulnerability is reachable via the public PKCS12_get_friendlyname() API
when parsing attacker-controlled PKCS#12 files. While PKCS12_parse() uses a
different code path that avoids this issue, PKCS12_get_friendlyname() directly
invokes the vulnerable function. Exploitation requires an attacker to provide
a malicious PKCS#12 file to be parsed by the application and the attacker
can just trigger a one zero byte write before the allocated buffer.
For that reason the issue was assessed as Low severity according to our
Security Policy.
The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,
as the PKCS#12 implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.
OpenSSL 1.0.2 is not affected by this issue.
Severity ?
No CVSS data available.
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
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Impacted products
Credits
Stanislav Fort (Aisle Research)
Norbert Pócs
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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