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CVE-2011-4079

4.0 · MEDIUM

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-…

Published Oct 27, 2011openldapCWE-189EPSS 3.27%

Overview

CVE-2011-4079 is a medium-severity vulnerability affecting openldap openldap. It was published on October 27, 2011 and has a CVSS 2.0 base score of 4.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from openldap. Update openldap to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
openldapopenldap0Affected

References

Refsecunia.com/advisories/46599Refsecurity.gentoo.org/glsa/glsa-201406-36.xmlRefwww.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9Refwww.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059Refwww.openwall.com/lists/oss-security/2011/10/26/5Refwww.openwall.com/lists/oss-security/2011/10/26/9Refwww.securityfocus.com/bid/50384Refwww.ubuntu.com/usn/USN-1266-1Refbugzilla.redhat.com/show_bug.cgi?id=749324Refexchange.xforce.ibmcloud.com/vulnerabilities/70991

How CyberStrike helps

Frequently asked questions

What is CVE-2011-4079?

CVE-2011-4079 is a medium-severity vulnerability affecting openldap openldap. It was published on October 27, 2011 and has a CVSS 2.0 base score of 4.0 (MEDIUM).

How severe is CVE-2011-4079?

This vulnerability has a CVSS 2.0 base score of 4.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2011-4079?

Check the references section for vendor advisories and patches from openldap. Update openldap to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-4079?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-4079 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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