CVE-2011-4079

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-10-27 · updated 2026-06-16
Weakness: CWE-189

Description

Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.

Affected products

openldap: through 2.4.26; 1.0, 1.0.1, 1.0.2, 1.0.3, 1.1, 1.1.0 (+168)

References

http://secunia.com/advisories/46599
http://security.gentoo.org/glsa/glsa-201406-36.xml
http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9
http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059
http://www.openwall.com/lists/oss-security/2011/10/26/5
http://www.openwall.com/lists/oss-security/2011/10/26/9
http://www.securityfocus.com/bid/50384
http://www.ubuntu.com/usn/USN-1266-1
https://bugzilla.redhat.com/show_bug.cgi?id=749324
https://exchange.xforce.ibmcloud.com/vulnerabilities/70991
http://secunia.com/advisories/46599
http://security.gentoo.org/glsa/glsa-201406-36.xml

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