RHSA-2020:5476

Vulnerability from csaf_opensuse - Published: 2020-12-15 00:00 - Updated: 2026-09-20 11:12
Summary
security update for openssl
Severity
Important
Notes
Title of the patch: security update for openssl
Description of the patch: This security update provides a functional equivalent of RHSA-2020:5476. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2020:5476.
Patchnames: RHSA-2020:5476
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2020-1971
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Liberty Linux 8:openssl-1:1.1.1g-12.el8_3.x86_64 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 8:openssl-devel-1:1.1.1g-12.el8_3.i686 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 8:openssl-devel-1:1.1.1g-12.el8_3.x86_64 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 8:openssl-libs-1:1.1.1g-12.el8_3.i686 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 8:openssl-libs-1:1.1.1g-12.el8_3.x86_64 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 8:openssl-perl-1:1.1.1g-12.el8_3.x86_64 —
Vendor Fix
Threats
Impact important
References
To clipboard 

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          "text": "https://www.suse.com/security/cve/CVE-2020-1971"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "The X.509 GeneralName type is a generic type for representing different types of names. One of those name types is known as EDIPartyName. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. A NULL pointer dereference and a crash may occur leading to a possible denial of service attack. OpenSSL itself uses the GENERAL_NAME_cmp function for two purposes: 1) Comparing CRL distribution point names between an available CRL and a CRL distribution point embedded in an X509 certificate 2) When verifying that a timestamp response token signer matches the timestamp authority name (exposed via the API functions TS_RESP_verify_response and TS_RESP_verify_token) If an attacker can control both items being compared then that attacker could trigger a crash. For example if the attacker can trick a client or server into checking a malicious certificate against a malicious CRL then this may occur. Note that some applications automatically download CRLs based on a URL embedded in a certificate. This checking happens prior to the signatures on the certificate and CRL being verified. OpenSSL\u0027s s_server, s_client and verify tools have support for the \"-crl_download\" option which implements automatic CRL downloading and this attack has been demonstrated to work against those tools. Note that an unrelated bug means that affected versions of OpenSSL cannot parse or construct correct encodings of EDIPARTYNAME. However it is possible to construct a malformed EDIPARTYNAME that OpenSSL\u0027s parser will accept and hence trigger this attack. All OpenSSL 1.1.1 and 1.0.2 versions are affected by this issue. Other OpenSSL releases are out of support and have not been checked. Fixed in OpenSSL 1.1.1i (Affected 1.1.1-1.1.1h). Fixed in OpenSSL 1.0.2x (Affected 1.0.2-1.0.2w).",
          "title": "CVE description"
        }
      ],
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          "summary": "CVE-2020-1971",
          "url": "https://www.suse.com/security/cve/CVE-2020-1971"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1179491 for CVE-2020-1971",
          "url": "https://bugzilla.suse.com/1179491"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1196179 for CVE-2020-1971",
          "url": "https://bugzilla.suse.com/1196179"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1199303 for CVE-2020-1971",
          "url": "https://bugzilla.suse.com/1199303"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Liberty Linux 8:openssl-1:1.1.1g-12.el8_3.x86_64",
            "SUSE Liberty Linux 8:openssl-devel-1:1.1.1g-12.el8_3.i686",
            "SUSE Liberty Linux 8:openssl-devel-1:1.1.1g-12.el8_3.x86_64",
            "SUSE Liberty Linux 8:openssl-libs-1:1.1.1g-12.el8_3.i686",
            "SUSE Liberty Linux 8:openssl-libs-1:1.1.1g-12.el8_3.x86_64",
            "SUSE Liberty Linux 8:openssl-perl-1:1.1.1g-12.el8_3.x86_64"
          ]
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      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "SUSE Liberty Linux 8:openssl-devel-1:1.1.1g-12.el8_3.i686",
            "SUSE Liberty Linux 8:openssl-devel-1:1.1.1g-12.el8_3.x86_64",
            "SUSE Liberty Linux 8:openssl-libs-1:1.1.1g-12.el8_3.i686",
            "SUSE Liberty Linux 8:openssl-libs-1:1.1.1g-12.el8_3.x86_64",
            "SUSE Liberty Linux 8:openssl-perl-1:1.1.1g-12.el8_3.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2020-12-15T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2020-1971"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.