Scientific Linux 5.x Low: CVE-2009-1384 Security Advisory for pam_krb5

Date: Tue, 27 Apr 2010 10:56:40 -0500
Reply-To: Troy Dawson 
Sender: Security Errata for Scientific Linux
 
From: Troy Dawson 
Subject: Security ERRATA Low: pam_krb5 on SL5.x i386/x86_64
Comments: To: "This email address is being protected from spambots. You need JavaScript enabled to view it."
 

Synopsis:	Low: pam_krb5 security and bug fix update
Issue date:	2010-03-30
CVE Names:	CVE-2009-1384

A flaw was found in pam_krb5. In some non-default configurations
(specifically, those where pam_krb5 would be the first module to prompt
for a password), the text of the password prompt varied based on whether
or not the username provided was a username known to the system. A
remote attacker could use this flaw to recognize valid usernames, which
would aid a dictionary-based password guess attack. (CVE-2009-1384)

This update also fixes the following bugs:

* certain applications which do not properly implement PAM conversations
may fail to authenticate users whose passwords have expired and must be
changed, or may succeed without forcing the user's password to be
changed. This bug is triggered by a previously-applied fix to pam_krb5
which makes it comply more closely to PAM specifications. If an
application misbehaves, enabling the "chpw_prompt" option for its
service should restore the old behavior. (BZ#509092)

* pam_krb5 does not allow the user to change an expired password in
cases where the Key Distribution Center (KDC) is configured to refuse
attempts to obtain forwardable password-changing credentials. This
update fixes this issue. (BZ#489015)

* failure to verify TGT because of wrong keytab handling. (BZ#450776)

SL 5.x

 SRPMS:
pam_krb5-2.2.14-15.src.rpm
 i386:
pam_krb5-2.2.14-15.i386.rpm
 x86_64:
pam_krb5-2.2.14-15.i386.rpm
pam_krb5-2.2.14-15.x86_64.rpm

-Connie Sieh
-Troy Dawson