rsyslog up to 5.7.5 Daemon Log Message release of resource

Summaryinfo

A vulnerability, which was classified as problematic, was found in rsyslog up to 5.7.5. This affects an unknown function of the component Daemon. The manipulation as part of Log Message results in release of resource. This vulnerability is known as CVE-2011-1489. Attacking locally is a requirement. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in rsyslog up to 5.7.5. Affected is some unknown functionality of the component Daemon. The manipulation as part of a Log Message leads to a release of resource vulnerability. CWE is classifying the issue as CWE-772. The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed. This is going to have an impact on availability. CVE summarizes:

A memory leak in rsyslog before 5.7.6 was found in the way deamon processed log messages were 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 published 11/14/2019. This vulnerability is traded as CVE-2011-1489 since 03/21/2011. The attack needs to be approached locally. A authentication is required for exploitation. There are neither technical details nor an exploit 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 (75191†). Similar entries are available at VDB-145559 and VDB-145561. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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