Bug 1476702 (CVE-2017-11747) - CVE-2017-11747 tinyproxy: Creating PID file after privileges dropping allows local DoS
Summary: CVE-2017-11747 tinyproxy: Creating PID file after privileges dropping allows ...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2017-11747
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: 1476704 1476703
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-07-31 08:54 UTC by Adam Mariš
Modified: 2019-09-29 14:17 UTC (History)
3 users (show)

Fixed In Version:
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Environment:
Last Closed: 2019-06-08 03:19:19 UTC


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Description Adam Mariš 2017-07-31 08:54:50 UTC
main.c in Tinyproxy 1.8.4 and earlier creates a /run/tinyproxy/tinyproxy.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for tinyproxy.pid modification before a root script executes a "kill `cat /run/tinyproxy/tinyproxy.pid`" command.

Upstream bug:

https://github.com/tinyproxy/tinyproxy/issues/106

Comment 1 Adam Mariš 2017-07-31 08:55:39 UTC
Created tinyproxy tracking bugs for this issue:

Affects: epel-all [bug 1476704]
Affects: fedora-all [bug 1476703]

Comment 2 Michael Adam 2017-11-16 09:33:53 UTC
Upstream patch: https://github.com/tinyproxy/tinyproxy/pull/120

Comment 3 Product Security DevOps Team 2019-06-08 03:19:19 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.


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