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Tasklist

FS#70531 - [xscreensaver] [Security] privilege escalation (CVE-2021-31523)

Attached to Project: Arch Linux
Opened by Jonas Witschel (diabonas) - Wednesday, 21 April 2021, 19:46 GMT
Last edited by Andreas Radke (AndyRTR) - Thursday, 22 April 2021, 06:43 GMT
Task Type Bug Report
Category Security
Status Closed
Assigned To No-one
Architecture All
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Summary
=======

The package xscreensaver is vulnerable to privilege escalation via CVE-2021-31523.

Guidance
========

Upgrading xscreensaver to the fixed version 6.00 (https://www.jwz.org/xscreensaver/xscreensaver-6.00.tar.gz) fixes the issue.

References
==========

https://security.archlinux.org/AVG-1857
https://www.openwall.com/lists/oss-security/2021/04/17/1
https://www.openwall.com/lists/oss-security/2021/04/21/3
https://www.openwall.com/lists/oss-security/2021/04/17/1/1
https://twitter.com/jwz/status/1383503845217554444
This task depends upon

Closed by  Andreas Radke (AndyRTR)
Thursday, 22 April 2021, 06:43 GMT
Reason for closing:  Not a bug
Additional comments about closing:  Arch is not affected by this issue
Comment by Jonas Witschel (diabonas) - Wednesday, 21 April 2021, 19:57 GMT
Never mind, Arch does not ship /usr/lib/xscreensaver/sonar with CAP_NET_RAW (as can be verified using "pacman -S xscreensaver; getcap /usr/lib/xscreensaver/sonar), so this issue is not exploitable with our package.

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