RHSA-2002:180

Vulnerability from csaf_redhat - Published: 2002-10-04 07:20 - Updated: 2025-11-21 17:25
Summary
Red Hat Security Advisory: nss_ldap ecurity update

Notes

Topic
Updated nss_ldap packages are now available for Red Hat Linux Advanced Server 2.1. These updates fix a potential buffer overflow which can occur when nss_ldap is set to configure itself using information stored in DNS as well as a format string bug in logging functions used in pam_ldap. [Updated 09 Jan 2003] Added fixed packages for the Itanium (IA64) architecture. [Updated 06 Feb 2003] Added fixed packages for Advanced Workstation 2.1
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 data returned by the server will fit into an internal buffer, leaving it vulnerable to a buffer overflow The Common Vulnerabilities and Exposures project 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 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. These 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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{
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      "text": "Important"
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    "category": "csaf_security_advisory",
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    "distribution": {
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    "notes": [
      {
        "category": "summary",
        "text": "Updated nss_ldap packages are now available for Red Hat Linux Advanced\nServer 2.1. These updates fix a potential buffer overflow which can occur\nwhen nss_ldap is set to configure itself using information stored in DNS\nas well as a format string bug in logging functions used in pam_ldap.\n\n[Updated 09 Jan 2003]\nAdded fixed packages for the Itanium (IA64) architecture.\n\n[Updated 06 Feb 2003]\nAdded fixed packages for Advanced Workstation 2.1",
        "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 data returned by the server will fit\ninto an internal buffer, leaving it vulnerable to a buffer overflow\nThe Common Vulnerabilities and Exposures project has assigned the name\nCAN-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 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. These packages are based on nss_ldap-189\nwith the addition of a backported security patch and pam_ldap version 144.\n\nThanks to the nss_ldap and pam_ldap team at padl.com for providing\ninformation about these issues.",
        "title": "Details"
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      {
        "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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        "url": "https://access.redhat.com/security/updates/classification/#important"
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      {
        "category": "external",
        "summary": "http://www.padl.com/Articles/PotentialBufferOverflowin.html",
        "url": "http://www.padl.com/Articles/PotentialBufferOverflowin.html"
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      {
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        "summary": "http://archives.neohapsis.com/archives/vulnwatch/2002-q2/0053.html",
        "url": "http://archives.neohapsis.com/archives/vulnwatch/2002-q2/0053.html"
      },
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        "summary": "http://www.kb.cert.org/vuls/id/738331",
        "url": "http://www.kb.cert.org/vuls/id/738331"
      },
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        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2002/rhsa-2002_180.json"
      }
    ],
    "title": "Red Hat Security Advisory: nss_ldap ecurity update",
    "tracking": {
      "current_release_date": "2025-11-21T17:25:03+00:00",
      "generator": {
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          "number": "1",
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          "date": "2002-08-13T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
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          "number": "3",
          "summary": "Last generated version"
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      "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"
        },
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          "date": "2002-10-04T07:20:00+00:00",
          "details": "This update is available via Red Hat Network.  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": [
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            "Red Hat Linux Advanced Workstation 2.1"
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          "text": "1616816"
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      "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"
        }
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          "summary": "RHBZ#1616816",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616816"
        },
        {
          "category": "external",
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          "url": "https://www.cve.org/CVERecord?id=CVE-2002-0825"
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        {
          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2002-0825"
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      ],
      "release_date": "2002-07-23T00:00:00+00:00",
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        {
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          "details": "This update is available via Red Hat Network.  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": [
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            "Red Hat Linux Advanced Workstation 2.1"
          ],
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          },
          "url": "https://access.redhat.com/errata/RHSA-2002:180"
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}


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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.



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