Bug 1280234

Summary:	kernel: Unprivileged user can freeze journald
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aquini, bhu, carnil, dhoward, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, kstutsma, lgoncalv, madhu.chinakonda, mchehab, mcressma, mrg-program-list, nmurray, rvrbovsk, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 00:48:34 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1279251, 1280236, 1501017
Bug Blocks:	1280238

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]