Bug 1280234 - kernel: Unprivileged user can freeze journald
kernel: Unprivileged user can freeze journald
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On: 1501017 1279251 1280236
Blocks: 1280238
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Reported: 2015-11-11 05:01 EST by Adam Mariš
Modified: 2017-10-11 23:19 EDT (History)
31 users (show)

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Doc Type: Bug Fix
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Description Adam Mariš 2015-11-11 05:01:39 EST
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):

Comment 1 Adam Mariš 2015-11-11 05:02:18 EST
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1280236]

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