A memory leak in rsyslog before 5.7.6 was found in the way deamon processed log messages are logged when $RepeatedMsgReduction was enabled. A local attacker could use this flaw to cause a denial of the rsyslogd daemon service by crashing the service via a sequence of repeated log messages sent within short periods of time.

References

• https://nvd.nist.gov/vuln/detail/CVE-2011-1488
• rsyslog/rsyslog@1ef709c
• https://access.redhat.com/security/cve/cve-2011-1488
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-1488
• https://security-tracker.debian.org/tracker/CVE-2011-1488
• http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00005.html