suse-su-2022:0859-1
Vulnerability from csaf_suse
Published
2022-03-15 18:37
Modified
2022-03-15 18:37
Summary
Security update for compat-openssl098

Notes

Title of the patch
Security update for compat-openssl098
Description of the patch
This update for compat-openssl098 fixes the following issues: - CVE-2022-0778: Infinite loop in BN_mod_sqrt() reachable when parsing certificates (bsc#1196877).
Patchnames
SUSE-2022-859,SUSE-SLE-Module-Legacy-12-2022-859,SUSE-SLE-SAP-12-SP3-2022-859,SUSE-SLE-SAP-12-SP4-2022-859,SUSE-SLE-SAP-12-SP5-2022-859
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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      "text": "important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
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        "title": "Description of the patch"
      },
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        "title": "Patchnames"
      },
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  "vulnerabilities": [
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          "text": "https://www.suse.com/security/cve/CVE-2022-0778"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).",
          "title": "CVE description"
        }
      ],
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2022-0778",
          "url": "https://www.suse.com/security/cve/CVE-2022-0778"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1196877 for CVE-2022-0778",
          "url": "https://bugzilla.suse.com/1196877"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1197328 for CVE-2022-0778",
          "url": "https://bugzilla.suse.com/1197328"
        },
        {
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          "summary": "SUSE Bug 1197340 for CVE-2022-0778",
          "url": "https://bugzilla.suse.com/1197340"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1199100 for CVE-2022-0778",
          "url": "https://bugzilla.suse.com/1199100"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1199254 for CVE-2022-0778",
          "url": "https://bugzilla.suse.com/1199254"
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        {
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          "summary": "SUSE Bug 1199303 for CVE-2022-0778",
          "url": "https://bugzilla.suse.com/1199303"
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        {
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        {
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          "summary": "SUSE Bug 1200090 for CVE-2022-0778",
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        },
        {
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          "summary": "SUSE Bug 1225670 for CVE-2022-0778",
          "url": "https://bugzilla.suse.com/1225670"
        }
      ],
      "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",
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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 Linux Enterprise Module for Legacy 12:libopenssl0_9_8-32bit-0.9.8j-106.33.1.s390x",
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            "SUSE Linux Enterprise Server for SAP Applications 12 SP3:libopenssl0_9_8-0.9.8j-106.33.1.x86_64",
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            "SUSE Linux Enterprise Server for SAP Applications 12 SP5:libopenssl0_9_8-0.9.8j-106.33.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2022-03-15T18:37:04Z",
          "details": "important"
        }
      ],
      "title": "CVE-2022-0778"
    }
  ]
}


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