rsyslog up to 5.7.5 Daemon Log Message release of resource

Summaryinfo

A vulnerability has been found in rsyslog up to 5.7.5 and classified as problematic. This impacts an unknown function of the component Daemon. This manipulation as part of Log Message causes release of resource. This vulnerability is handled as CVE-2011-1490. It is possible to launch the attack on the local host. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in rsyslog up to 5.7.5 and classified as problematic. Affected by this vulnerability is an unknown part of the component Daemon. The manipulation as part of a Log Message leads to a release of resource vulnerability. The CWE definition for the vulnerability is CWE-772. The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed. As an impact it is known to affect availability. The summary by CVE is:

A memory leak in rsyslog before 5.7.6 was found in the way deamon processed log messages are logged when multiple rulesets were used and some output batches contained messages belonging to more than one ruleset. A local attacker could cause denial of the rsyslogd daemon service via a log message belonging to more than one ruleset

The bug was discovered 03/03/2011. The weakness was released 11/14/2019. This vulnerability is known as CVE-2011-1490 since 03/21/2011. An attack has to be approached locally. A single authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 22 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 76012 (openSUSE Security Update : rsyslog (openSUSE-SU-2011:0326-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165189 (SUSE Security Update for Multiple Packages (SUSE-SR:2011:007)).

Upgrading to version 5.7.6 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (76012) and OSVDB (75192†). Entries connected to this vulnerability are available at VDB-145559 and VDB-145560. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• rsyslog

Version

• 5.7.0
• 5.7.1
• 5.7.2
• 5.7.3
• 5.7.4
• 5.7.5

License

• open-source

Website

• Product: https://github.com/rsyslog/rsyslog/

CPE 2.3info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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