rhsa-2003_224
Vulnerability from csaf_redhat
Published
2003-07-29 07:27
Modified
2024-11-21 22:47
Summary
Red Hat Security Advisory: openssh security update

Notes

Topic
Updated OpenSSH packages are now available. These updates close an information leak caused by sshd's interaction with the PAM system.
Details
OpenSSH is a suite of network connectivity tools that can be used to establish encrypted connections between systems on a network and can provide interactive login sessions and port forwarding, among other functions. When configured to allow password-based or challenge-response authentication, sshd (the OpenSSH server) uses PAM (Pluggable Authentication Modules) to verify the user's password. Under certain conditions, OpenSSH versions prior to 3.6.1p1 reject an invalid authentication attempt without first attempting authentication using PAM. If PAM is configured with its default failure delay, the amount of time sshd takes to reject an invalid authentication request varies widely enough that the timing variations could be used to deduce whether or not an account with a specified name existed on the server. This information could then be used to narrow the focus of an attack against some other system component. These updates contain backported fixes that cause sshd to always attempt PAM authentication when performing password and challenge-response authentication for clients.
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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{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Low"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Updated OpenSSH packages are now available.  These updates close an\ninformation leak caused by sshd\u0027s interaction with the PAM system.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "OpenSSH is a suite of network connectivity tools that can be used to\nestablish encrypted connections between systems on a network and can\nprovide interactive login sessions and port forwarding, among other functions.\n\nWhen configured to allow password-based or challenge-response\nauthentication, sshd (the OpenSSH server) uses PAM (Pluggable\nAuthentication Modules) to verify the user\u0027s password.  Under certain\nconditions, OpenSSH versions prior to 3.6.1p1 reject an invalid\nauthentication attempt without first attempting authentication using PAM.\n\nIf PAM is configured with its default failure delay, the amount of time\nsshd takes to reject an invalid authentication request varies widely enough\nthat the timing variations could be used to deduce whether or not an\naccount with a specified name existed on the server.  This information\ncould then be used to narrow the focus of an attack against some other\nsystem component.\n\nThese updates contain backported fixes that cause sshd to always attempt\nPAM authentication when performing password and challenge-response\nauthentication for clients.",
        "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": {
      "category": "vendor",
      "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-2003:224",
        "url": "https://access.redhat.com/errata/RHSA-2003:224"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#low",
        "url": "https://access.redhat.com/security/updates/classification/#low"
      },
      {
        "category": "external",
        "summary": "98594",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=98594"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2003/rhsa-2003_224.json"
      }
    ],
    "title": "Red Hat Security Advisory: openssh security update",
    "tracking": {
      "current_release_date": "2024-11-21T22:47:46+00:00",
      "generator": {
        "date": "2024-11-21T22:47:46+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.2.1"
        }
      },
      "id": "RHSA-2003:224",
      "initial_release_date": "2003-07-29T07:27:00+00:00",
      "revision_history": [
        {
          "date": "2003-07-29T07:27:00+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2003-07-29T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-21T22:47:46+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "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"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux Advanced Workstation 2.1",
                "product": {
                  "name": "Red Hat Linux Advanced Workstation 2.1",
                  "product_id": "Red Hat Linux Advanced Workstation 2.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:2.1::aw"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux ES version 2.1",
                "product": {
                  "name": "Red Hat Enterprise Linux ES version 2.1",
                  "product_id": "Red Hat Enterprise Linux ES version 2.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:2.1::es"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux WS version 2.1",
                "product": {
                  "name": "Red Hat Enterprise Linux WS version 2.1",
                  "product_id": "Red Hat Enterprise Linux WS version 2.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:2.1::ws"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Enterprise Linux"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2003-0190",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616997"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "OpenSSH-portable (OpenSSH) 3.6.1p1 and earlier with PAM support enabled immediately sends an error message when a user does not exist, which allows remote attackers to determine valid usernames via a timing attack.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
          "Red Hat Enterprise Linux ES version 2.1",
          "Red Hat Enterprise Linux WS version 2.1",
          "Red Hat Linux Advanced Workstation 2.1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2003-0190"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616997",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616997"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2003-0190",
          "url": "https://www.cve.org/CVERecord?id=CVE-2003-0190"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2003-0190",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2003-0190"
        }
      ],
      "release_date": "2003-04-30T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2003-07-29T07:27:00+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 ",
            "Red Hat Enterprise Linux ES version 2.1",
            "Red Hat Enterprise Linux WS version 2.1",
            "Red Hat Linux Advanced Workstation 2.1"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2003:224"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "security flaw"
    }
  ]
}


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