Signature Detail
Short Name |
APP:KERBEROS:XREALM-KDC-DOS |
|---|---|
Severity |
High |
Recommended |
Yes |
Recommended Action |
Drop |
Category |
APP |
Keywords |
MIT Kerberos Cross-Realm Referrals KDC Denial of Service |
Release Date |
2014/02/18 |
Update Number |
2346 |
Supported Platforms |
idp-4.1+, isg-3.5+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
APP: MIT Kerberos Cross-Realm Referrals KDC Denial of Service
This signature detects attempts to exploit a known vulnerability against MIT Kerberos. The vulnerability is due to a NULL pointer dereference within the process_tgs_req function. A successful attack can allow a remote authenticated attacker to trigger a denial of service condition on the targeted application.
Extended Description
do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.11 before 1.11.4, when a single-component realm name is used, allows remote authenticated users to cause a denial of service (daemon crash) via a TGS-REQ request that triggers an attempted cross-realm referral for a host-based service principal.
Affected Products
- mit kerberos 5-1.11
- mit kerberos 5-1.11.1
- mit kerberos 5-1.11.2
- mit kerberos 5-1.11.3
References
- CVE: CVE-2013-1417