APP: MIT Kerberos 5 KDC Null Pointer Dereference
This signature detects attempts to exploit a known vulnerability against MIT Kerberos 5 KDC Server. A successful attack can result in a denial-of-service condition.
Extended Description
The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.
Affected Products
Mit kerberos_5
References
CVE: CVE-2016-3120
Short Name
APP:KERBEROS:KERB-NULL-POINTER
Severity
Major
Recommended
False
Recommended Action
Drop
Category
APP
Keywords
5 CVE-2016-3120 Dereference KDC Kerberos MIT Null Pointer
Release Date
08/18/2016
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
3602
Port
UDP/88
False Positive
Unknown
Vendors
Mit
CVSS Score
4.0