Bug 1319858

Summary:	vtun: high CPU usage after SIGHUP
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	carnil, somlo
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:	2016-05-02 08:45:37 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:	1319859, 1319860, 1319861
Bug Blocks:

Description Andrej Nemec 2016-03-21 16:48:27 UTC

A vulnerability was found in the vtun package. When you send a SIGHUP to a vtun client process and it cannot connect to the remote server, vtun tries to reconnect without sleep between each attempt.
In result, the vtun process uses a lot of CPU, and writes to syslog without limit.

References (with proposed patch):

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=818489

Comment 1 Andrej Nemec 2016-03-21 16:48:54 UTC

Created vtun tracking bugs for this issue:

Affects: fedora-all [bug 1319859]
Affects: epel-5 [bug 1319860]
Affects: epel-6 [bug 1319861]

Comment 2 Fedora Update System 2016-04-04 17:26:14 UTC

vtun-3.0.3-15.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-04-05 13:53:54 UTC

vtun-3.0.3-15.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-04-05 14:18:31 UTC

vtun-3.0.3-15.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2016-04-05 16:21:02 UTC

vtun-3.0.3-15.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2016-04-06 14:53:16 UTC

vtun-3.0.1-10.el5 has been pushed to the Fedora EPEL 5 stable repository. If problems still persist, please make note of it in this bug report.

Comment 7 Andrej Nemec 2016-05-02 08:45:37 UTC

Closing this as per:

http://seclists.org/oss-sec/2016/q2/157
http://seclists.org/oss-sec/2016/q2/173