A weakness has been reported in Kerberos, which can be exploited by malicious users to cause a DoS (Denial of Service).
The vulnerability is caused due to a NULL pointer dereference error in the "check_1_6_dummy()" function in src/lib/kadm5/srv/svr_principal.c. This can be exploited to cause a crash via a create-principal request containing no password but the KRB5_KDB_DISALLOW_ALL_TIX flag.
Successful exploitation requires an administrator account with "create" privileges.
The weakness is reported in versions prior to 1.10.2.
Solution: Update to version 1.10.2.
Provided and/or discovered by: Reported by the vendor.
Original Advisory: http://web.mit.edu/kerberos/krb5-1.10/
Do you have additional information related to this advisory?
Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this
information to firstname.lastname@example.org
Subject: Kerberos "check_1_6_dummy()" Denial of Service Weakness
No posts yet
You must be logged in to post a comment.
Secunia Customer Login
Not a customer already?
Learn more about how our market leading Vulnerability Management solutions can help you manage risk and ensure compliance.