suse-su-2021:0955-1
Vulnerability from csaf_suse
Published
2021-03-25 15:11
Modified
2021-03-25 15:11
Summary
Security update for openssl-1_1

Notes

Title of the patch
Security update for openssl-1_1
Description of the patch
This update for openssl-1_1 fixes the security issue: * CVE-2021-3449: 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 but includes a signature_algorithms_cert extension, then a NULL pointer dereference will result, leading to a crash and a denial of service attack. OpenSSL TLS clients are not impacted by this issue. [bsc#1183852]
Patchnames
SUSE-2021-955,SUSE-SLE-Module-Basesystem-15-SP2-2021-955,SUSE-SLE-Module-Basesystem-15-SP3-2021-955,SUSE-SUSE-MicroOS-5.0-2021-955
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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  "vulnerabilities": [
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2021-3449"
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        {
          "category": "general",
          "text": "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).",
          "title": "CVE description"
        }
      ],
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          "summary": "SUSE Bug 1183852 for CVE-2021-3449",
          "url": "https://bugzilla.suse.com/1183852"
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          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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            "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"
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      ],
      "threats": [
        {
          "category": "impact",
          "date": "2021-03-25T15:11:58Z",
          "details": "important"
        }
      ],
      "title": "CVE-2021-3449"
    }
  ]
}


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