Public Date:
1216133: CVE-2015-2694 krb5: issues in OTP and PKINIT kdcpreauth modules leading to requires_preauth bypass
A flaw was found in the OTP kdcpreauth module of MIT Kerberos. A remote attacker could use this flaw to bypass the requires_preauth flag on a client principal and obtain a ciphertext encrypted in the principal's long-term key. This ciphertext could be used to conduct an off-line dictionary attack against the user's password.

Find out more about CVE-2015-2694 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue does not affect the version of krb5 package as shipped with Red Hat Enterprise Linux 5 and 6.

CVSS v2 metrics

Base Score 5.8
Base Metrics AV:N/AC:M/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 7 (krb5) RHSA-2015:2154 2015-11-19

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 6 krb5 Not affected
Red Hat Enterprise Linux 5 krb5 Not affected
Last Modified