GLSA 202210-26: Shadow: TOCTOU Race
Severity: | normal |
Title: | Shadow: TOCTOU Race |
Date: | 10/31/2022 |
Bugs: |
|
ID: | 202210-26 |
Synopsis
A TOCTOU race has been discovered in Shadow, which could result in the unauthorized modification of files.Background
Shadow contains utilities to deal with user accounts
Affected packages
Package | Vulnerable | Unaffected | Architecture(s) |
---|---|---|---|
sys-apps/shadow | < 4.12.2 | >= 4.12.2 | All supported architectures |
Description
A TOCTOU race condition was discovered in shadow. A local attacker with write privileges in a directory removed or copied by usermod/userdel could potentially exploit this flaw when the administrator invokes usermod/userdel.
Impact
An unauthorized user could potentially modify files which they do not have write permissions for.
Workaround
There is no known workaround at this time.
Resolution
All Shadow users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.12.2"
References
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.