CVE-2011-1527

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    CVE-2011-1527

    Published: 20 Oct 2011Last Modified: 10 Apr 2026

    Summary:

    Details: 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.

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

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High