Bug 1597286 (CVE-2017-18226)

Summary:	CVE-2017-18226 jabberd: privilege escalation via PID file manipulation
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abergmann, adrian, bennie.joubert, bkearney, dmaphy, ggainey, meissner, tlestach
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Last Closed:	2018-07-02 15:35:31 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Andrej Nemec 2018-07-02 13:29:12 UTC

It was found that jabberd through 2.6.1 sets the ownership of /var/run/jabber to the jabber account, which might allow local users to kill arbitrary processes by leveraging access to this account for PID file modification before a root script executes a "kill -TERM `cat /var/run/jabber/filename.pid`" command.

References:

https://bugs.gentoo.org/631068

Comment 1 Adrian Reber 2018-07-02 14:51:17 UTC

As far as I can tell this does not affect Fedora as the PID files are not used by systemd.