APP: MIT Kerberos KDC Authentication Denial of Service (2)
This signature detects attempts to exploit a known denial of service vulnerability in MIT's Kerberos KDC. It is due to an assertion failure when handling invalid Authentication Service requests. Remote unauthenticated attackers can exploit this by sending a crafted AS-REQ packet to the target KDC, causing it to crash, creating a denial-of-service condition.
Extended Description
Double free vulnerability in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7.x and 1.8.x before 1.8.2 allows remote authenticated users to cause a denial of service (daemon crash) or possibly execute arbitrary code via a request associated with (1) renewal or (2) validation.
Affected Products
Mit kerberos_5
References
CVE: CVE-2010-1320
Short Name
APP:KERBEROS:KDC-AUTH-DOS-2
Severity
Major
Recommended
False
Recommended Action
None
Category
APP
Keywords
(2) Authentication CVE-2010-1320 Denial KDC Kerberos MIT Service of
Release Date
07/25/2019
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
CVSS Score
4.0