rhsa-2002:175
Vulnerability from csaf_redhat
Published
2002-10-04 07:19
Modified
2024-11-21 22:27
Summary
Red Hat Security Advisory: : Updated nss_ldap packages fix buffer overflow

Notes

Topic
Updated nss_ldap packages are now available for Red Hat Linux 6.2, 7, 7.1, 7.2, and 7.3. These updates fix a potential buffer overflow which can occur when nss_ldap is set to configure itself using information stored in DNS, a format string bug in logging functions used in pam_ldap, and to properly handle truncated DNS responses.
Details
nss_ldap is a set of C library extensions that allow X.500 and LDAP directory servers to be used as a primary source of aliases, ethers, groups, hosts, networks, protocols, users, RPCs, services, and shadow passwords (instead of or in addition to using flat files or NIS). When versions of nss_ldap prior to nss_ldap-198 are configured without a value for the "host" setting, nss_ldap will attempt to configure itself by using SRV records stored in DNS. When parsing the results of the DNS query, nss_ldap does not check that the data returned by the server will fit into an internal buffer, leaving it vulnerable to a buffer overflow. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2002-0825 to this issue. When versions of nss_ldap prior to nss_ldap-199 are configured without a value for the "host" setting, nss_ldap will attempt to configure itself by using SRV records stored in DNS. When parsing the results of the DNS query, nss_ldap does not check that the data returned has not been truncated by the resolver libraries to avoid a buffer overflow, and may attempt to parse more data than is actually available, leaving it vulnerable to a read buffer overflow. Versions of pam_ldap prior to version 144 include a format string bug in the logging function. The packages included in this erratum update pam_ldap to version 144, fixing this bug. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2002-0374 to this issue. All users of nss_ldap should update to these errata packages which are not vulnerable to the above issues. The errata packages are based on nss_ldap-189 with the addition of a backported security patch and pam_ldap version 144. Thanks to the nss_ldap and pam_ldap team at padl.com for providing information about these issues.
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": "Important"
    },
    "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 nss_ldap packages are now available for Red Hat Linux 6.2, 7, 7.1,\n7.2, and 7.3. These updates fix a potential buffer overflow which can occur\nwhen nss_ldap is set to configure itself using information stored in DNS,\na format string bug in logging functions used in pam_ldap, and to properly\nhandle truncated DNS responses.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "nss_ldap is a set of C library extensions that allow X.500 and LDAP\ndirectory servers to be used as a primary source of aliases, ethers,\ngroups, hosts, networks, protocols, users, RPCs, services, and shadow\npasswords (instead of or in addition to using flat files or NIS).\n\nWhen versions of nss_ldap prior to nss_ldap-198 are configured without a\nvalue for the \"host\" setting, nss_ldap will attempt to configure itself by\nusing SRV records stored in DNS.  When parsing the results of the DNS\nquery, nss_ldap does not check that the data returned by the server will\nfit into an internal buffer, leaving it vulnerable to a buffer overflow.\nThe Common Vulnerabilities and Exposures project (cve.mitre.org) has\nassigned the name CAN-2002-0825 to this issue.\n\nWhen versions of nss_ldap prior to nss_ldap-199 are configured without a\nvalue for the \"host\" setting, nss_ldap will attempt to configure itself by\nusing SRV records stored in DNS.  When parsing the results of the DNS\nquery, nss_ldap does not check that the data returned has not been\ntruncated by the resolver libraries to avoid a buffer overflow, and may\nattempt to parse more data than is actually available, leaving it\nvulnerable to a read buffer overflow.  \n\nVersions of pam_ldap prior to version 144 include a format string bug in\nthe logging function. The packages included in this erratum update pam_ldap\nto version 144, fixing this bug.  The Common Vulnerabilities and Exposures\nproject (cve.mitre.org) has assigned the name CAN-2002-0374 to this issue.\n\nAll users of nss_ldap should update to these errata packages which are not\nvulnerable to the above issues. The errata packages are based on\nnss_ldap-189 with the addition of a backported security patch and pam_ldap\nversion 144.\n\nThanks to the nss_ldap and pam_ldap team at padl.com for providing\ninformation about these issues.",
        "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-2002:175",
        "url": "https://access.redhat.com/errata/RHSA-2002:175"
      },
      {
        "category": "external",
        "summary": "http://www.padl.com/Articles/PotentialBufferOverflowin.html",
        "url": "http://www.padl.com/Articles/PotentialBufferOverflowin.html"
      },
      {
        "category": "external",
        "summary": "http://www.padl.com/OSS/pam_ldap.html",
        "url": "http://www.padl.com/OSS/pam_ldap.html"
      },
      {
        "category": "external",
        "summary": "http://archives.neohapsis.com/archives/vulnwatch/2002-q2/0053.html",
        "url": "http://archives.neohapsis.com/archives/vulnwatch/2002-q2/0053.html"
      },
      {
        "category": "external",
        "summary": "http://www.kb.cert.org/vuls/id/738331",
        "url": "http://www.kb.cert.org/vuls/id/738331"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2002/rhsa-2002_175.json"
      }
    ],
    "title": "Red Hat Security Advisory: : Updated nss_ldap packages fix buffer overflow",
    "tracking": {
      "current_release_date": "2024-11-21T22:27:06+00:00",
      "generator": {
        "date": "2024-11-21T22:27:06+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.2.1"
        }
      },
      "id": "RHSA-2002:175",
      "initial_release_date": "2002-10-04T07:19:00+00:00",
      "revision_history": [
        {
          "date": "2002-10-04T07:19:00+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2002-08-12T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-21T22:27:06+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Linux 6.2",
                "product": {
                  "name": "Red Hat Linux 6.2",
                  "product_id": "Red Hat Linux 6.2",
                  "product_identification_helper": {
                    "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"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux 7.1",
                "product": {
                  "name": "Red Hat Linux 7.1",
                  "product_id": "Red Hat Linux 7.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:7.1"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux 7.2",
                "product": {
                  "name": "Red Hat Linux 7.2",
                  "product_id": "Red Hat Linux 7.2",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:7.2"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux 7.3",
                "product": {
                  "name": "Red Hat Linux 7.3",
                  "product_id": "Red Hat Linux 7.3",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:7.3"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Linux"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2002-0374",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616764"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Format string vulnerability in the logging function for the pam_ldap PAM LDAP module before version 144 allows attackers to execute arbitrary code via format strings in the configuration file name.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "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"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2002-0374"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616764",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616764"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2002-0374",
          "url": "https://www.cve.org/CVERecord?id=CVE-2002-0374"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2002-0374",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2002-0374"
        }
      ],
      "release_date": "2002-05-06T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2002-10-04T07:19:00+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 Linux 6.2",
            "Red Hat Linux 7.0",
            "Red Hat Linux 7.1",
            "Red Hat Linux 7.2",
            "Red Hat Linux 7.3"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2002:175"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "security flaw"
    },
    {
      "cve": "CVE-2002-0825",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616816"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Buffer overflow in the DNS SRV code for nss_ldap before nss_ldap-198 allows remote attackers to cause a denial of service and possibly execute arbitrary code.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "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"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2002-0825"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616816",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616816"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2002-0825",
          "url": "https://www.cve.org/CVERecord?id=CVE-2002-0825"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2002-0825",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2002-0825"
        }
      ],
      "release_date": "2002-07-23T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2002-10-04T07:19:00+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 Linux 6.2",
            "Red Hat Linux 7.0",
            "Red Hat Linux 7.1",
            "Red Hat Linux 7.2",
            "Red Hat Linux 7.3"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2002:175"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "security flaw"
    }
  ]
}


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