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CVE-2021-32842

CVE-2021-32842 · Path Traversal in SharpZipLib

This page contains facts from public vulnerability sources. Check the original advisory before updating.

SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Starting version 1.0.0 and prior to version 1.3.3, a check was added if the destination file is under a destination directory. However, it is not enforced that `_baseDirectory` ends with slash. If the _baseDirectory is not slash terminated like `/home/user/dir` it is possible to create a file with a name thats begins as the destination directory one level up from the directory, i.e. `/home/user/dir.sh`. Because of the file name and destination directory constraints, the arbitrary file creation impact is limited and depends on the use case. Version 1.3.3 fixed this vulnerability.

CVSS 4.0 · Medium · EPSS 0.9%

Published
Updated

Stack: system

Affected products and versions

  • sharpziplib

    Versions
    • ≥ 1.3.3, < 1.3.3: Affected (custom)
    • ≥ 1.0.0, < 1.0.0*: Affected (custom)

    No fix published

  • mono Ubuntu:14.04:LTS

    Versions
    • 2.10.8.1-5ubuntu2
    • 3.2.3+dfsg-5
    • 3.2.3+dfsg-7ubuntu1
    • 3.2.8+dfsg-4ubuntu1
    • 3.2.8+dfsg-4ubuntu1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mono Ubuntu:16.04:LTS

    Versions
    • 3.2.8+dfsg-4ubuntu4
    • 4.2.1.102+dfsg2-5ubuntu1
    • 4.2.1.102+dfsg2-7ubuntu4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mono Ubuntu:18.04:LTS

    Versions
    • 4.6.2.7+dfsg-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mono Ubuntu:20.04:LTS

    Versions
    • 5.18.0.240+dfsg-3
    • 6.8.0.105+dfsg-1
    • 6.8.0.105+dfsg-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mono Ubuntu:22.04:LTS

    Versions
    • 6.8.0.105+dfsg-3.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mono Ubuntu:24.04:LTS

    Versions
    • 6.8.0.105+dfsg-3.4
    • 6.8.0.105+dfsg-3.5ubuntu1
    • 6.8.0.105+dfsg-3.6ubuntu1
    • 6.8.0.105+dfsg-3.6ubuntu2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mono Ubuntu:25.10

    Versions
    • 6.12.0.199+dfsg-3
    • 6.12.0.199+dfsg-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mono Ubuntu:26.10

    Versions
    • 6.14.1+ds2-2
    • 6.14.1+ds2-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mono Ubuntu:26.04:LTS

    Versions
    • 6.12.0.199+dfsg-6
    • 6.14.1+ds2-1
    • 6.14.1+ds2-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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