CVE-2021-3450 (GCVE-0-2021-3450)

Vulnerability from cvelistv5 – Published: 2021-03-25 14:25 – Updated: 2024-09-17 03:07
VLAI?
Title
CA certificate check bypass with X509_V_FLAG_X509_STRICT
Summary
The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer 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 1.1.1h-1.1.1j).
Severity ?
No CVSS data available.
CWE
  • Invalid Certificate Verification
Assigner
References
https://www.openssl.org/news/secadv/20210325.txt x_refsource_CONFIRM
https://git.openssl.org/gitweb/?p=openssl.git%3Ba… x_refsource_CONFIRM
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
http://www.openwall.com/lists/oss-security/2021/03/27/1 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/03/27/2 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/03/28/3 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/03/28/4 mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202103-03 vendor-advisoryx_refsource_GENTOO
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://www.oracle.com/security-alerts/cpuApr2021.html x_refsource_MISC
https://www.tenable.com/security/tns-2021-09 x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2021032… x_refsource_CONFIRM
https://security.FreeBSD.org/advisories/FreeBSD-S… x_refsource_MISC
https://www.tenable.com/security/tns-2021-05 x_refsource_CONFIRM
https://kc.mcafee.com/corporate/index?page=conten… x_refsource_CONFIRM
https://www.tenable.com/security/tns-2021-08 x_refsource_CONFIRM
https://mta.openssl.org/pipermail/openssl-announc… x_refsource_MISC
https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
https://kb.pulsesecure.net/articles/Pulse_Securit… x_refsource_CONFIRM
https://psirt.global.sonicwall.com/vuln-detail/SN… x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpuoct2021.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC
https://cert-portal.siemens.com/productcert/pdf/s… x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpujul2022.html x_refsource_MISC
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j)
Create a notification for this product.
Credits
Benjamin Kaduk (Akamai), Xiang Ding (Akamai), others at Akamai
Show details on NVD website
To clipboard 

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              "url": "https://security.gentoo.org/glsa/202103-03"
            },
            {
              "name": "FEDORA-2021-cbf14ab8f9",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpuApr2021.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"
            },
            {
              "name": "https://www.tenable.com/security/tns-2021-09",
              "refsource": "CONFIRM",
              "url": "https://www.tenable.com/security/tns-2021-09"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210326-0006/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210326-0006/"
            },
            {
              "name": "https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc",
              "refsource": "MISC",
              "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc"
            },
            {
              "name": "https://www.tenable.com/security/tns-2021-05",
              "refsource": "CONFIRM",
              "url": "https://www.tenable.com/security/tns-2021-05"
            },
            {
              "name": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10356",
              "refsource": "CONFIRM",
              "url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10356"
            },
            {
              "name": "https://www.tenable.com/security/tns-2021-08",
              "refsource": "CONFIRM",
              "url": "https://www.tenable.com/security/tns-2021-08"
            },
            {
              "name": "https://mta.openssl.org/pipermail/openssl-announce/2021-March/000198.html",
              "refsource": "MISC",
              "url": "https://mta.openssl.org/pipermail/openssl-announce/2021-March/000198.html"
            },
            {
              "name": "https://www.oracle.com//security-alerts/cpujul2021.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
            },
            {
              "name": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845",
              "refsource": "CONFIRM",
              "url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845"
            },
            {
              "name": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013",
              "refsource": "CONFIRM",
              "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpuoct2021.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpujul2022.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpujul2022.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2021-3450",
    "datePublished": "2021-03-25T14:25:14.287Z",
    "dateReserved": "2021-03-19T00:00:00.000Z",
    "dateUpdated": "2024-09-17T03:07:10.879Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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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.



Detection rules are retrieved from Rulezet.