An integer signedness error, leading to heap based buffer overflow was found in the way the imfile module of rsyslog, an enhanced system logging and kernel message trapping daemon, processed text files larger than 64 KB. When the imfile rsyslog module was enabled, a local attacker could use this flaw to cause denial of service (rsyslogd daemon hang) via specially-crafted message, to be logged.
Upstream bug report:
This issue did NOT affect the version of rsyslog package, as shipped with Red Hat Enterprise Linux 5.
This issue affects the version of the rsyslog package, as shipped with Red Hat Enterprise Linux 6.
This issue did NOT affect the versions of the rsyslog package, as shipped with Fedora release of 15 and 16.
Please use CVE-2011-4623 for this issue as per http://www.openwall.com/lists/oss-security/2011/12/22/2
This issue has been addressed in following products:
Red Hat Enterprise Linux 6
Via RHSA-2012:0796 https://rhn.redhat.com/errata/RHSA-2012-0796.html