Bug 476647 (CVE-2008-5617) - CVE-2008-5617 rsyslog: $AllowedSender restriction not honoured
Summary: CVE-2008-5617 rsyslog: $AllowedSender restriction not honoured
Alias: CVE-2008-5617
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2008-12-16 13:51 UTC by Peter Vrabec
Modified: 2009-01-09 08:39 UTC (History)
3 users (show)

Fixed In Version: 3.21.9
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2009-01-09 08:39:47 UTC

Attachments (Terms of Use)

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:

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.

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.


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:


Note You need to log in before you can comment on or make changes to this bug.