Signature Detail
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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+ |
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 1.13
- Mit kerberos_5 1.13.1
- Mit kerberos_5 1.13.2
- Mit kerberos_5 1.13.3
- Mit kerberos_5 1.13.4
- Mit kerberos_5 1.13.5
- Mit kerberos_5 1.13.6
- Mit kerberos_5 1.14
- Mit kerberos_5 1.14.1
- Mit kerberos_5 1.14.2
References
- CVE: CVE-2016-3120