Short Name |
APP:KERBEROS:KERB-NULL-POINTER |
---|---|
Severity |
Major |
Recommended |
No |
Recommended Action |
Drop |
Category |
APP |
Keywords |
MIT Kerberos 5 KDC Null Pointer Dereference |
Release Date |
2016/08/18 |
Update Number |
2769 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
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.
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.