CVE-2011-1527

Name: CVE-2011-1527
Creator: NVD / NIST
Published: 2011-10-20T21:55:00.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.65%

Last modified Jun 16, 2026

CVE-2011-1527 is a vulnerability of currently unknown severity. The kdb_ldap plugin in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.1, when the LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a kinit operation with incorrect string case for the realm, related to the is_principal_in_realm, krb5_set_error_message, krb5_ldap_get_principal, and process_as_req functions.. EPSS estimates a 3.65% chance of exploitation in the next 30 days.

Description

The kdb_ldap plugin in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.1, when the LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a kinit operation with incorrect string case for the realm, related to the is_principal_in_realm, krb5_set_error_message, krb5_ldap_get_principal, and process_as_req functions.

Metrics

EPSS Probability

3.65%

88.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mit	Kerberos 5	1.9
Mit	Kerberos 5	1.9.1

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629558
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-006.txtVendor Advisory
http://www.kb.cert.org/vuls/id/659251US Government Resource
http://www.mandriva.com/security/advisories?name=MDVSA-2011:159
http://www.redhat.com/support/errata/RHSA-2011-1379.htmlVendor Advisory
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629558
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-006.txtVendor Advisory
http://www.kb.cert.org/vuls/id/659251US Government Resource
http://www.mandriva.com/security/advisories?name=MDVSA-2011:159
http://www.redhat.com/support/errata/RHSA-2011-1379.htmlVendor Advisory

Timeline

Published: Oct 20, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-1527?

How severe is CVE-2011-1527?

Severity scoring for CVE-2011-1527 is pending analysis. The EPSS model estimates a 3.65% probability of exploitation in the next 30 days.

How do I fix CVE-2011-1527?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-1527?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST