cve-2021-3450
Vulnerability from cvelistv5
Published
2021-03-25 14:25
Modified
2024-09-17 03:07
Severity ?
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).
References
openssl-security@openssl.orghttp://www.openwall.com/lists/oss-security/2021/03/27/1Mailing List, Third Party Advisory
openssl-security@openssl.orghttp://www.openwall.com/lists/oss-security/2021/03/27/2Mailing List, Third Party Advisory
openssl-security@openssl.orghttp://www.openwall.com/lists/oss-security/2021/03/28/3Mailing List, Third Party Advisory
openssl-security@openssl.orghttp://www.openwall.com/lists/oss-security/2021/03/28/4Mailing List, Third Party Advisory
openssl-security@openssl.orghttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfThird Party Advisory
openssl-security@openssl.orghttps://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2a40b7bc7b94dd7de897a74571e7024f0cf0d63b
openssl-security@openssl.orghttps://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845Third Party Advisory
openssl-security@openssl.orghttps://kc.mcafee.com/corporate/index?page=content&id=SB10356Third Party Advisory
openssl-security@openssl.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/
openssl-security@openssl.orghttps://mta.openssl.org/pipermail/openssl-announce/2021-March/000198.htmlMailing List, Vendor Advisory
openssl-security@openssl.orghttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013Third Party Advisory
openssl-security@openssl.orghttps://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.ascThird Party Advisory
openssl-security@openssl.orghttps://security.gentoo.org/glsa/202103-03Third Party Advisory
openssl-security@openssl.orghttps://security.netapp.com/advisory/ntap-20210326-0006/Third Party Advisory
openssl-security@openssl.orghttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJdThird Party Advisory
openssl-security@openssl.orghttps://www.openssl.org/news/secadv/20210325.txtVendor Advisory
openssl-security@openssl.orghttps://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
openssl-security@openssl.orghttps://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
openssl-security@openssl.orghttps://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
openssl-security@openssl.orghttps://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
openssl-security@openssl.orghttps://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
openssl-security@openssl.orghttps://www.tenable.com/security/tns-2021-05Third Party Advisory
openssl-security@openssl.orghttps://www.tenable.com/security/tns-2021-08Third Party Advisory
openssl-security@openssl.orghttps://www.tenable.com/security/tns-2021-09Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/03/27/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/03/27/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/03/28/3Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/03/28/4Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2a40b7bc7b94dd7de897a74571e7024f0cf0d63b
af854a3a-2127-422b-91ae-364da2661108https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://kc.mcafee.com/corporate/index?page=content&id=SB10356Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/
af854a3a-2127-422b-91ae-364da2661108https://mta.openssl.org/pipermail/openssl-announce/2021-March/000198.htmlMailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.ascThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202103-03Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210326-0006/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJdThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openssl.org/news/secadv/20210325.txtVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/security/tns-2021-05Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/security/tns-2021-08Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/security/tns-2021-09Third Party Advisory
Impacted products
Vendor Product Version
Show details on NVD website

To clipboard 

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              "value": "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)."
            }
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        },
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            "url": "https://www.openssl.org/policies/secpolicy.html#High",
            "value": "High"
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        ],
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          "problemtype_data": [
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                {
                  "lang": "eng",
                  "value": "Invalid Certificate Verification"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.openssl.org/news/secadv/20210325.txt",
              "refsource": "CONFIRM",
              "url": "https://www.openssl.org/news/secadv/20210325.txt"
            },
            {
              "name": "https://www.openssl.org/news/secadv/20210325.txt",
              "refsource": "CONFIRM",
              "url": "https://www.openssl.org/news/secadv/20210325.txt"
            },
            {
              "name": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2a40b7bc7b94dd7de897a74571e7024f0cf0d63b",
              "refsource": "CONFIRM",
              "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2a40b7bc7b94dd7de897a74571e7024f0cf0d63b"
            },
            {
              "name": "20210325 Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: March 2021",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJd"
            },
            {
              "name": "[oss-security] 20210327 OpenSSL 1.1.1 CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT, CVE-2021-3449 NULL pointer deref in signature_algorithms processing",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/03/27/1"
            },
            {
              "name": "[oss-security] 20210327 Re: OpenSSL 1.1.1 CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT, CVE-2021-3449 NULL pointer deref in signature_algorithms processing",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/03/27/2"
            },
            {
              "name": "[oss-security] 20210328 Re: OpenSSL 1.1.1 CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT, CVE-2021-3449 NULL pointer deref in signature_algorithms processing",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/03/28/3"
            },
            {
              "name": "[oss-security] 20210328 Re: OpenSSL 1.1.1 CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT, CVE-2021-3449 NULL pointer deref in signature_algorithms processing",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/03/28/4"
            },
            {
              "name": "GLSA-202103-03",
              "refsource": "GENTOO",
              "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"
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              "name": "https://www.tenable.com/security/tns-2021-09",
              "refsource": "CONFIRM",
              "url": "https://www.tenable.com/security/tns-2021-09"
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            {
              "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"
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            {
              "name": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10356",
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              "url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10356"
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              "url": "https://www.tenable.com/security/tns-2021-08"
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              "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",
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              "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"
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            {
              "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"
            }
          ]
        }
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    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2021-3450",
    "datePublished": "2021-03-25T14:25:14.287899Z",
    "dateReserved": "2021-03-19T00:00:00",
    "dateUpdated": "2024-09-17T03:07:10.879Z",
    "state": "PUBLISHED"
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Advisory\"]},{\"url\":\"https://www.oracle.com//security-alerts/cpujul2021.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpuApr2021.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpuapr2022.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpujul2022.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpuoct2021.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.tenable.com/security/tns-2021-05\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.tenable.com/security/tns-2021-08\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.tenable.com/security/tns-2021-09\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}"
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.