RHSA-2003:081

Vulnerability from csaf_redhat - Published: 2003-05-22 17:13 - Updated: 2025-11-21 17:25
Summary
Red Hat Security Advisory: zlib security update

Notes

Topic
Updated zlib packages that fix a buffer overflow vulnerability are now available.
Details
Zlib is a general-purpose, patent-free, lossless data compression library that is used by many different programs. The function gzprintf within zlib, when called with a string longer than Z_PRINTF_BUFZISE (= 4096 bytes), can overflow without giving a warning. zlib-1.1.4 and earlier exhibit this behavior. There are no known exploits of the gzprintf overrun, and only a few programs, including rpm2html and gimp-print, are known to use the gzprintf function. The problem has been fixed by checking the length of the output string within gzprintf.
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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        "category": "summary",
        "text": "Updated zlib packages that fix a buffer overflow vulnerability are now\navailable.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Zlib is a general-purpose, patent-free, lossless data compression\nlibrary that is used by many different programs.\n\nThe function gzprintf within zlib, when called with a string longer than\nZ_PRINTF_BUFZISE (= 4096 bytes), can overflow without giving a warning. \n\nzlib-1.1.4 and earlier exhibit this behavior. There are no known exploits\nof the gzprintf overrun, and only a few programs, including rpm2html\nand gimp-print, are known to use the gzprintf function.\n\nThe problem has been fixed by checking the length of the output string\nwithin gzprintf.",
        "title": "Details"
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        "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.",
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          "text": "Buffer overflow in the gzprintf function in zlib 1.1.4, when zlib is compiled without vsnprintf or when long inputs are truncated using vsnprintf, allows attackers to cause a denial of service or possibly execute arbitrary code.",
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}


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Sightings

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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.



Detection rules are retrieved from Rulezet.