RHSA-2003:200

Vulnerability from csaf_redhat - Published: 2003-07-01 15:24 - Updated: 2025-11-21 17:26
Summary
Red Hat Security Advisory: unzip security update

Notes

Topic
Updated unzip packages resolving a vulnerability allowing arbitrary files to be overwritten are now available. [Updated 15 August 2003] Ben Laurie found that the original patch to fix this issue missed a case where the path component included a quoted slash. These updated packages contain a new patch that corrects this issue.
Details
The unzip utility is used for manipulating archives, which are multiple files stored inside of a single file. A vulnerabilitiy in unzip version 5.50 and earlier allows attackers to overwrite arbitrary files during archive extraction by placing invalid (non-printable) characters between two "." characters. These non-printable characters are filtered, resulting in a ".." sequence. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0282 to this issue. This erratum includes a patch ensuring that non-printable characters do not make it possible for a malicious .zip file to write to parent directories unless the "-:" command line parameter is specified. Users of unzip are advised to upgrade to these updated packages, which are not vulnerable to 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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    "distribution": {
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    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Updated unzip packages resolving a vulnerability allowing arbitrary files\nto be overwritten are now available.\n\n[Updated 15 August 2003]\nBen Laurie found that the original patch to fix this issue missed a case\nwhere the path component included a quoted slash. These updated packages\ncontain a new patch that corrects this issue.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "The unzip utility is used for manipulating archives, which are multiple\nfiles stored inside of a single file.\n\nA vulnerabilitiy in unzip version 5.50 and earlier allows attackers to\noverwrite arbitrary files during archive extraction by placing invalid\n(non-printable) characters between two \".\" characters. These non-printable\ncharacters are filtered, resulting in a \"..\" sequence. The Common\nVulnerabilities and Exposures project (cve.mitre.org) has assigned the name\nCAN-2003-0282 to this issue.\n\nThis erratum includes a patch ensuring that non-printable characters do not\nmake it possible for a malicious .zip file to write to parent directories\nunless the \"-:\" command line parameter is specified.\n\nUsers of unzip are advised to upgrade to these updated packages, which are\nnot vulnerable to 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"
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    "title": "Red Hat Security Advisory: unzip security update",
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      "notes": [
        {
          "category": "description",
          "text": "Directory traversal vulnerability in UnZip 5.50 allows attackers to overwrite arbitrary files via invalid characters between two . (dot) characters, which are filtered and result in a \"..\" sequence.",
          "title": "Vulnerability description"
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      "release_date": "2003-05-09T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2003-07-01T15:24:00+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.",
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}


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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.