RedHat: Moderate: pam_krb5 security update
Summary
The pam_krb5 module allows Pluggable Authentication Modules (PAM) aware
applications to use Kerberos to verify user identities by obtaining user
credentials at log in time.
A flaw was found in the pam_krb5 "existing_ticket" configuration option. If
a system is configured to use an existing credential cache via the
"existing_ticket" option, it may be possible for a local user to gain
elevated privileges by using a different, local user's credential cache.
(CVE-2008-3825)
Red Hat would like to thank Stéphane Bertin for responsibly disclosing this
issue.
Users of pam_krb5 should upgrade to this updated package, which contains a
backported patch to resolve this issue.
Summary
Solution
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
References
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3825 http://www.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm
x86_64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-2.2.14-1.el5_2.1.x86_64.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm
ia64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-2.2.14-1.el5_2.1.ia64.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.ia64.rpm
ppc:
pam_krb5-2.2.14-1.el5_2.1.ppc.rpm
pam_krb5-2.2.14-1.el5_2.1.ppc64.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.ppc.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.ppc64.rpm
s390x:
pam_krb5-2.2.14-1.el5_2.1.s390.rpm
pam_krb5-2.2.14-1.el5_2.1.s390x.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.s390.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.s390x.rpm
x86_64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-2.2.14-1.el5_2.1.x86_64.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.i386.rpm
pam_krb5-debuginfo-2.2.14-1.el5_2.1.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package
Topic
An updated pam_krb5 package that fixes a security issue is now available for Red Hat Enterprise Linux 5.
This update has been rated as having moderate security impact by the Red Hat Security Response Team.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Bugs Fixed
461960 - CVE-2008-3825 pam_krb5 existing_ticket permission flaw