APP: MIT Kerberos Cross-Realm Referrals KDC(UDP) 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
References
CVE: CVE-2013-1417
Short Name
APP:KERBEROS:XREALM-KDC-UDP-DOS
Severity
Major
Recommended
False
Recommended Action
Drop
Category
APP
Keywords
CVE-2013-1417 Cross-Realm Denial KDC(UDP) Kerberos MIT Referrals Service of
Release Date
03/01/2021
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
3761
Port
UDP/88
False Positive
Unknown
Vendors
Mit