Bug 476647 (CVE-2008-5617)

Summary:	CVE-2008-5617 rsyslog: $AllowedSender restriction not honoured
Product:	[Other] Security Response	Reporter:	Peter Vrabec <pvrabec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jlieskov, pvrabec, theinric
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	3.21.9	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-01-09 08:39:47 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:

Description Peter Vrabec 2008-12-16 13:51:04 UTC

Description of problem:
A vulnerability has been found in rsyslog's ACL handling. Due to a coding error in the modularization effort, the $AllowedSender directive is no longer honored but silently accepted. As such, rsyslog-based access control via $AllowedSender is not working and messages from every sender will be accepted by rsyslog. Most importantly, this could lead to misleading log entries or a remote DoS, by a malicious sender simply flooding the system logs with messages until the system runs out of disk space.

Comment 1 Peter Vrabec 2008-12-16 13:51:34 UTC

Security Advisory:
http://www.rsyslog.com/Article322.phtml

Comment 2 Fedora Update System 2008-12-17 09:51:21 UTC

rsyslog-3.20.2-2.fc9 has been submitted as an update for Fedora 9.
http://admin.fedoraproject.org/updates/rsyslog-3.20.2-2.fc9

Comment 3 Tomas Hoger 2008-12-17 10:21:36 UTC

CVE id CVE-2008-5617 was assigned to this issue:

The ACL handling in rsyslog 3.12.1 to 3.20.0, 4.1.0, and 4.1.1 does
not follow $AllowedSender directive, which allows remote attackers to
bypass intended access restrictions and spoof log messages or create a
large number of spurious messages.

References:
http://www.rsyslog.com/Article322.phtml
http://www.rsyslog.com/Topic4.phtml

Comment 4 Jan Lieskovsky 2008-12-17 10:40:05 UTC

This issue did not affect the version of the rsyslog package, as shipped
with Red Hat Enterprise Linux 5.

Comment 5 Fedora Update System 2008-12-21 08:38:15 UTC

rsyslog-3.20.2-2.fc9 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2008-12-21 08:44:50 UTC

rsyslog-3.21.9-1.fc10 has been pushed to the Fedora 10 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Red Hat Product Security 2009-01-09 08:39:47 UTC

This issue was addressed in:

Fedora:
  https://admin.fedoraproject.org/updates/F10/FEDORA-2008-11476
  https://admin.fedoraproject.org/updates/F9/FEDORA-2008-11538