APP: Kerberos Multi-realm KDC NULL Pointer Dereference Denial of Service
This signature detects attempts to exploit a known vulnerability in the Kerberos protocol. The vulnerability is due to a NULL pointer dereference within the setup_server_realm() function when Kerberos is configured to serve multiple realms. A remote attacker can exploit this vulnerability by sending a malicious request to a vulnerable installation of Kerberos. Successful exploitation will cause the krb5kdc daemon to terminate resulting in a denial of service condition.
Extended Description
The setup_server_realm function in main.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.7, when multiple realms are configured, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted request.
Affected Products
Opensuse opensuse
References
CVE: CVE-2013-1418
Short Name
APP:KERBEROS:MULTI-REALM-DOS
Severity
Major
Recommended
False
Recommended Action
Drop
Category
APP
Keywords
CVE-2013-1418 Denial Dereference KDC Kerberos Multi-realm NULL Pointer Service of
Release Date
02/24/2014
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3590
Port
TCP/88
False Positive
Unknown
Vendors
Opensuse
Debian
Mit
CVSS Score
4.3