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CVE-2023-29383

CVE-2023-29383

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

In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that "cat /etc/passwd" shows a rogue user account.

CVSS 3.3 · Low · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • shadow Debian:12

    Versions
    • 1:4.13+dfsg1-1
    Affected ranges
    • ECOSYSTEM: < 1:4.13+dfsg1-1+deb12u1

    Update to 1:4.13+dfsg1-1+deb12u1

  • shadow Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:4.13+dfsg1-2

    Update to 1:4.13+dfsg1-2

  • shadow Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:4.13+dfsg1-2

    Update to 1:4.13+dfsg1-2

  • shadow Ubuntu:Pro:14.04:LTS

    Versions
    • 1:4.1.5.1-1ubuntu6
    • 1:4.1.5.1-1ubuntu7
    • 1:4.1.5.1-1ubuntu8
    • 1:4.1.5.1-1ubuntu9
    • 1:4.1.5.1-1ubuntu9.1
    • 1:4.1.5.1-1ubuntu9.2
    • 1:4.1.5.1-1ubuntu9.4
    • 1:4.1.5.1-1ubuntu9.5
    • 1:4.1.5.1-1ubuntu9.5+esm1
    • 1:4.1.5.1-1ubuntu9.5+esm2
    • 1:4.1.5.1-1ubuntu9.5+esm3
    • 1:4.1.5.1-1ubuntu9.5+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • shadow Ubuntu:Pro:16.04:LTS

    Versions
    • 1:4.1.5.1-1.1ubuntu7
    • 1:4.2-3.1ubuntu1
    • 1:4.2-3.1ubuntu2
    • 1:4.2-3.1ubuntu3
    • 1:4.2-3.1ubuntu4
    • 1:4.2-3.1ubuntu5
    • 1:4.2-3.1ubuntu5.2
    • 1:4.2-3.1ubuntu5.3
    • 1:4.2-3.1ubuntu5.4
    • 1:4.2-3.1ubuntu5.5+esm1
    • 1:4.2-3.1ubuntu5.5+esm2
    • 1:4.2-3.1ubuntu5.5+esm3
    • 1:4.2-3.1ubuntu5.5+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • shadow Ubuntu:Pro:18.04:LTS

    Versions
    • 1:4.2-3.2ubuntu4
    • 1:4.5-1ubuntu1
    • 1:4.5-1ubuntu2
    • 1:4.5-1ubuntu2.2
    • 1:4.5-1ubuntu2.3
    • 1:4.5-1ubuntu2.4
    • 1:4.5-1ubuntu2.5
    • 1:4.5-1ubuntu2.5+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • shadow Ubuntu:20.04:LTS

    Versions
    • 1:4.5-1.1ubuntu4
    • 1:4.8-1ubuntu1
    • 1:4.8.1-1ubuntu1
    • 1:4.8.1-1ubuntu2
    • 1:4.8.1-1ubuntu3
    • 1:4.8.1-1ubuntu4
    • 1:4.8.1-1ubuntu5
    • 1:4.8.1-1ubuntu5.20.04
    • 1:4.8.1-1ubuntu5.20.04.1
    • 1:4.8.1-1ubuntu5.20.04.2
    • 1:4.8.1-1ubuntu5.20.04.3
    • 1:4.8.1-1ubuntu5.20.04.4
    • 1:4.8.1-1ubuntu5.20.04.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • shadow Ubuntu:22.04:LTS

    Versions
    • 1:4.8.1-1ubuntu9
    • 1:4.8.1-1ubuntu10
    • 1:4.8.1-2ubuntu1
    • 1:4.8.1-2ubuntu2
    • 1:4.8.1-2ubuntu2.1
    • 1:4.8.1-2ubuntu2.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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