RHSA-2003_062

Vulnerability from csaf_redhat - Published: 2003-03-06 15:10 - Updated: 2024-11-21 22:41
Summary
Red Hat Security Advisory: : Updated OpenSSL packages fix timing attack

Notes

Topic
Updated OpenSSL packages are available that fix a potential timing-based attack.
Details
OpenSSL is a commercial-grade, full-featured, and open source toolkit that implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. In a paper, Brice Canvel, Alain Hiltgen, Serge Vaudenay, and Martin Vuagnoux describe and demonstrate a timing-based attack on CBC ciphersuites in SSL and TLS. An active attacker may be able to use timing observations to distinguish between two different error cases: cipher padding errors and MAC verification errors. Over multiple connections this can leak sufficient information to make it possible to retrieve the plaintext of a common, fixed block. In order for an attack to be sucessful, an attacker must be able to act as a man-in-the-middle to intercept and modify multiple connections, which all involve a common fixed plaintext block (such as a password), and have good network conditions that allow small changes in timing to be reliably observed. These erratum packages contain a patch provided by the OpenSSL group that corrects this vulnerability. Because server applications are affected by these vulnerabilities, we advise users to restart all services that use OpenSSL functionality or alternatively reboot their systems after installing these updates.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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      "text": "Moderate"
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    "category": "csaf_security_advisory",
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    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
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    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Updated OpenSSL packages are available that fix a potential timing-based\nattack.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "OpenSSL is a commercial-grade, full-featured, and open source toolkit that \nimplements the Secure Sockets Layer (SSL v2/v3) and Transport Layer\nSecurity (TLS v1) protocols as well as a full-strength general purpose\ncryptography library.\n\nIn a paper, Brice Canvel, Alain Hiltgen, Serge Vaudenay, and Martin\nVuagnoux describe and demonstrate a timing-based attack on CBC ciphersuites\nin SSL and TLS.  An active attacker may be able to use timing observations\nto distinguish between two different error cases: cipher padding errors and\nMAC verification errors.  Over multiple connections this can leak\nsufficient information to make it possible to retrieve the plaintext of a\ncommon, fixed block.\n\nIn order for an attack to be sucessful, an attacker must be able to act as\na man-in-the-middle to intercept and modify multiple connections, which all\ninvolve a common fixed plaintext block (such as a password), and have good\nnetwork conditions that allow small changes in timing to be reliably\nobserved.\n\nThese erratum packages contain a patch provided by the OpenSSL group that\ncorrects this vulnerability.\n\nBecause server applications are affected by these vulnerabilities, we\nadvise users to restart all services that use OpenSSL functionality or\nalternatively reboot their systems after installing these updates.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
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    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2003:062",
        "url": "https://access.redhat.com/errata/RHSA-2003:062"
      },
      {
        "category": "external",
        "summary": "http://lasecwww.epfl.ch/pub/lasec/doc/Vau02a.ps",
        "url": "http://lasecwww.epfl.ch/pub/lasec/doc/Vau02a.ps"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2003/rhsa-2003_062.json"
      }
    ],
    "title": "Red Hat Security Advisory: : Updated OpenSSL packages fix timing attack",
    "tracking": {
      "current_release_date": "2024-11-21T22:41:37+00:00",
      "generator": {
        "date": "2024-11-21T22:41:37+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.2.1"
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      "id": "RHSA-2003:062",
      "initial_release_date": "2003-03-06T15:10:00+00:00",
      "revision_history": [
        {
          "date": "2003-03-06T15:10:00+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2003-02-19T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-21T22:41:37+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
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                "product": {
                  "name": "Red Hat Linux 6.2",
                  "product_id": "Red Hat Linux 6.2",
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                    "cpe": "cpe:/o:redhat:linux:6.2"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux 7.0",
                "product": {
                  "name": "Red Hat Linux 7.0",
                  "product_id": "Red Hat Linux 7.0",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:7.0"
                  }
                }
              },
              {
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                "product": {
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                  "product_id": "Red Hat Linux 7.1",
                  "product_identification_helper": {
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              },
              {
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                "name": "Red Hat Linux 7.3",
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                  "name": "Red Hat Linux 7.3",
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  "vulnerabilities": [
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      "cve": "CVE-2003-0078",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616956"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "ssl3_get_record in s3_pkt.c for OpenSSL before 0.9.7a and 0.9.6 before 0.9.6i does not perform a MAC computation if an incorrect block cipher padding is used, which causes an information leak (timing discrepancy) that may make it easier to launch cryptographic attacks that rely on distinguishing between padding and MAC verification errors, possibly leading to extraction of the original plaintext, aka the \"Vaudenay timing attack.\"",
          "title": "Vulnerability description"
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          "text": "security flaw",
          "title": "Vulnerability summary"
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          "Red Hat Linux 7.0",
          "Red Hat Linux 7.1",
          "Red Hat Linux 7.2",
          "Red Hat Linux 7.3",
          "Red Hat Linux 8.0"
        ]
      },
      "references": [
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          "category": "self",
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          "url": "https://access.redhat.com/security/cve/CVE-2003-0078"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616956",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616956"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2003-0078",
          "url": "https://www.cve.org/CVERecord?id=CVE-2003-0078"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2003-0078",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2003-0078"
        }
      ],
      "release_date": "2003-02-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2003-03-06T15:10:00+00:00",
          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nTo update all RPMs for your particular architecture, run:\n\nrpm -Fvh [filenames]\n\nwhere [filenames] is a list of the RPMs you wish to upgrade.  Only those\nRPMs which are currently installed will be updated.  Those RPMs which are\nnot installed but included in the list will not be updated.  Note that you\ncan also use wildcards (*.rpm) if your current directory *only* contains\nthe desired RPMs.\n\nPlease note that this update is also available via Red Hat Network.  Many\npeople find this an easier way to apply updates.  To use Red Hat Network,\nlaunch the Red Hat Update Agent with the following command:\n\nup2date\n\nThis will start an interactive process that will result in the appropriate\nRPMs being upgraded on your system.",
          "product_ids": [
            "Red Hat Linux 6.2",
            "Red Hat Linux 7.0",
            "Red Hat Linux 7.1",
            "Red Hat Linux 7.2",
            "Red Hat Linux 7.3",
            "Red Hat Linux 8.0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2003:062"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "security flaw"
    }
  ]
}


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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.



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