Bug 1597286 (CVE-2017-18226) - CVE-2017-18226 jabberd: privilege escalation via PID file manipulation
Summary: CVE-2017-18226 jabberd: privilege escalation via PID file manipulation
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-18226
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-07-02 13:29 UTC by Andrej Nemec
Modified: 2019-09-29 14:43 UTC (History)
8 users (show)

Fixed In Version:
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Last Closed: 2018-07-02 15:35:31 UTC
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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.
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