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Category:   Application (Security)  >   Kerberos Vendors:   MIT
Kerberos kadmind Policy Processing Null Pointer Dereference Lets Remote Authenticated Users Deny Service
SecurityTracker Alert ID:  1034915
SecurityTracker URL:  http://securitytracker.com/id/1034915
CVE Reference:   CVE-2015-8630   (Links to External Site)
Date:  Feb 2 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Kerberos. A remote authenticated user can cause denial of service conditions on the target system.

A remote authenticated user with permission to modify a principal entry can send specially crafted data with a null policy value but with KADM5_POLICY set to trigger a null pointer dereference in kadm5_modify_principal() and cause the target kadmind service to crash.

Impact:   A remote authenticated user can cause denial of service conditions on the target kadmind service.
Solution:   The vendor has issued a source code fix, available at:

https://github.com/krb5/krb5/commit/b863de7fbf080b15e347a736fdda0a82d42f4f6b

Vendor URL:  web.mit.edu/kerberos/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Apr 1 2016 (Red Hat Issues Fix) Kerberos kadmind Policy Processing Null Pointer Dereference Lets Remote Authenticated Users Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Apr 1 2016 (CentOS Issues Fix) Kerberos kadmind Policy Processing Null Pointer Dereference Lets Remote Authenticated Users Deny Service
CentOS has issued a fix for CentOS 7.
Apr 1 2016 (Oracle Issues Fix for Oracle Linux) Kerberos kadmind Policy Processing Null Pointer Dereference Lets Remote Authenticated Users Deny Service
Oracle has issued a fix for Oracle Linux 7.



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