Bug 1280234 - kernel: Unprivileged user can freeze journald
Summary: kernel: Unprivileged user can freeze journald
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1279251 1280236 1501017
Blocks: 1280238
TreeView+ depends on / blocked
 
Reported: 2015-11-11 10:01 UTC by Adam Mariš
Modified: 2021-10-21 00:48 UTC (History)
25 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-10-21 00:48:34 UTC
Embargoed:

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Description Adam Mariš 2015-11-11 10:01:39 UTC 
It was found that an unprivileged user can freeze journald because of using inappropriate rules to decide if a file descriptor sent by a user is safe to read. Journald is then killed and restarted by systemd after 1 minute, but attacker could run exploit in a loop, causing DoS to journald.

Original bug report (including reproducer):

https://bugzilla.redhat.com/show_bug.cgi?id=1279251
Comment 1 Adam Mariš 2015-11-11 10:02:18 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1280236]
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