RHSA-2003_068

Vulnerability from csaf_redhat - Published: 2003-02-26 16:23 - Updated: 2024-11-21 22:33
Summary
Red Hat Security Advisory: vnc security update

Notes

Topic
Updated VNC packages are available to fix a weak cookie vulnerability.
Details
VNC is a tool for providing a remote graphical user interface. The VNC server acts as an X server, but the script for starting it generates an MIT X cookie (which is used for X authentication) without using a strong enough random number generator. This could allow an attacker to be able to more easily guess the authentication cookie. All users of VNC are advised to upgrade to these erratum packages, which contain a patch to correct this issue.
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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{
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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.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
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    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Updated VNC packages are available to fix a weak cookie vulnerability.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "VNC is a tool for providing a remote graphical user interface.  \n\nThe VNC server acts as an X server, but the script for starting it\ngenerates an MIT X cookie (which is used for X authentication) without\nusing a strong enough random number generator.  This could allow an\nattacker to be able to more easily guess the authentication cookie.\n\nAll users of VNC are advised to upgrade to these erratum packages, which\ncontain a patch to correct this issue.",
        "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"
      }
    ],
    "publisher": {
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      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2003:068",
        "url": "https://access.redhat.com/errata/RHSA-2003:068"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#moderate",
        "url": "https://access.redhat.com/security/updates/classification/#moderate"
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        "summary": "84598",
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        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2003/rhsa-2003_068.json"
      }
    ],
    "title": "Red Hat Security Advisory: vnc security update",
    "tracking": {
      "current_release_date": "2024-11-21T22:33:13+00:00",
      "generator": {
        "date": "2024-11-21T22:33:13+00:00",
        "engine": {
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      "id": "RHSA-2003:068",
      "initial_release_date": "2003-02-26T16:23:00+00:00",
      "revision_history": [
        {
          "date": "2003-02-26T16:23:00+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2003-02-07T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-21T22:33:13+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
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  },
  "product_tree": {
    "branches": [
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        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
                "product": {
                  "name": "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
                  "product_id": "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:2.1::as"
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  "vulnerabilities": [
    {
      "cve": "CVE-2002-1511",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616921"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The vncserver wrapper for vnc before 3.3.3r2-21 uses the rand() function instead of srand(), which causes vncserver to generate weak cookies.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 "
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2002-1511"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616921",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616921"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2002-1511",
          "url": "https://www.cve.org/CVERecord?id=CVE-2002-1511"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2002-1511",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2002-1511"
        }
      ],
      "release_date": "2002-10-11T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2003-02-26T16:23:00+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 the\ndesired 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 Enterprise Linux AS (Advanced Server) version 2.1 "
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2003:068"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "security flaw"
    }
  ]
}


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Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.