CVE-2011-4623

Severity: low (CVSS 2.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-09-25 · updated 2026-06-16
Weakness: CWE-189

Description

Integer overflow in the rsCStrExtendBuf function in runtime/stringbuf.c in the imfile module in rsyslog 4.x before 4.6.6, 5.x before 5.7.4, and 6.x before 6.1.4 allows local users to cause a denial of service (daemon hang) via a large file, which triggers a heap-based buffer overflow.

Affected products

rsyslog: 4.1.0, 4.1.1, 4.1.2, 4.1.3, 4.1.4, 4.1.5 (+66)

References

http://bugzilla.adiscon.com/show_bug.cgi?id=221
http://git.adiscon.com/?p=rsyslog.git%3Ba=commit%3Bh=6bad782f154b7f838c7371bf99c13f6dc4ec4101
http://rsyslog.com/changelog-for-4-6-6-v4-stable/
http://rsyslog.com/changelog-for-5-7-4-v5-beta/
http://rsyslog.com/changelog-for-6-1-4-devel/
http://secunia.com/advisories/45848
http://secunia.com/advisories/47698
http://www.openwall.com/lists/oss-security/2011/12/22/2
http://www.securityfocus.com/bid/51171
http://www.securitytracker.com/id?1026556
http://www.ubuntu.com/usn/USN-1338-1
https://bugzilla.redhat.com/show_bug.cgi?id=769822

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