Bug 1476702 (CVE-2017-11747)

Summary:	CVE-2017-11747 tinyproxy: Creating PID file after privileges dropping allows local DoS
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	axel.delahaye, jeremy, madam
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2019-06-08 03:19:19 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:	1476703, 1476704
Bug Blocks:

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.