CVE-2021-3449 (GCVE-0-2021-3449)

Vulnerability from cvelistv5 – Published: 2021-03-25 14:25 – Updated: 2024-09-17 03:43
VLAI?
Title
NULL pointer deref in signature_algorithms processing
Summary
An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).
Severity ?
No CVSS data available.
CWE
  • NULL pointer dereference
Assigner
References
https://www.openssl.org/news/secadv/20210325.txt
https://git.openssl.org/gitweb/?p=openssl.git%3Ba…
https://tools.cisco.com/security/center/content/C… vendor-advisory
https://www.debian.org/security/2021/dsa-4875 vendor-advisory
http://www.openwall.com/lists/oss-security/2021/03/27/1 mailing-list
http://www.openwall.com/lists/oss-security/2021/03/27/2 mailing-list
http://www.openwall.com/lists/oss-security/2021/03/28/3 mailing-list
http://www.openwall.com/lists/oss-security/2021/03/28/4 mailing-list
https://security.gentoo.org/glsa/202103-03 vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://www.oracle.com/security-alerts/cpuApr2021.html
https://www.tenable.com/security/tns-2021-10
https://www.tenable.com/security/tns-2021-09
https://security.netapp.com/advisory/ntap-2021051…
https://security.netapp.com/advisory/ntap-2021032…
https://security.FreeBSD.org/advisories/FreeBSD-S…
https://www.tenable.com/security/tns-2021-06
https://www.tenable.com/security/tns-2021-05
https://kc.mcafee.com/corporate/index?page=conten…
https://www.oracle.com//security-alerts/cpujul2021.html
https://cert-portal.siemens.com/productcert/pdf/s…
https://kb.pulsesecure.net/articles/Pulse_Securit…
https://psirt.global.sonicwall.com/vuln-detail/SN…
https://lists.debian.org/debian-lts-announce/2021… mailing-list
https://www.oracle.com/security-alerts/cpuoct2021.html
https://www.oracle.com/security-alerts/cpuapr2022.html
https://cert-portal.siemens.com/productcert/pdf/s…
https://www.oracle.com/security-alerts/cpujul2022.html
https://security.netapp.com/advisory/ntap-2024062…
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j)
Create a notification for this product.
Credits
Peter Kästle (Nokia) and Samuel Sapalski (Nokia)
Show details on NVD website
To clipboard 

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  "cveMetadata": {
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    "assignerShortName": "openssl",
    "cveId": "CVE-2021-3449",
    "datePublished": "2021-03-25T14:25:13.659Z",
    "dateReserved": "2021-03-17T00:00:00.000Z",
    "dateUpdated": "2024-09-17T03:43:55.497Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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  • 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.
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  • 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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