ALT-PU-2023-1828-2

Package update shadow in branch sisyphus

Version4.13-alt5

Published2026-02-04

Max severityLOW

Severity:

Closed issues (2)

LOW3.3

Уязвимость утилиты для управления учетными записями Shadow, связанная с недостаточной нейтрализацией специальных элементов в запросе, позволяющая нарушителю оказать воздействие на целостность данных

Published: 2024-09-13Modified: 2026-03-04

CVSS 3.xLOW 3.3

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS 2.0LOW 1.7

CVSS:2.0/AV:L/AC:L/Au:S/C:N/I:P/A:N

References

CVE-2023-29383

LOW3.3

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.

Published: 2023-04-14Modified: 2025-11-03

CVSS 3.xLOW 3.3

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References