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Security Advisory Moderate: pam_krb5 security update

Advisory: RHSA-2008:0907-2
Type: Security Advisory
Severity: Moderate
Issued on: 2008-10-02
Last updated on: 2008-10-02
Affected Products: Red Hat Enterprise Linux (v. 5 server)
Red Hat Enterprise Linux Desktop (v. 5 client)
Red Hat Enterprise Linux EUS (v. 5.2.z server)
CVEs (cve.mitre.org): CVE-2008-3825

Details

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.

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.


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
http://kbase.redhat.com/faq/FAQ_58_10188

Updated packages

Red Hat Enterprise Linux (v. 5 server)

SRPMS:
pam_krb5-2.2.14-1.el5_2.1.src.rpm
File outdated by:  RHBA-2012:0246
    MD5: cb49da099c31a7c980379e69f11f74cf
 
IA-32:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
File outdated by:  RHBA-2012:0246
    MD5: 47c08c28a7b8535a27e9681ad929e6b9
 
IA-64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
File outdated by:  RHBA-2012:0246
    MD5: 47c08c28a7b8535a27e9681ad929e6b9
pam_krb5-2.2.14-1.el5_2.1.ia64.rpm
File outdated by:  RHBA-2012:0246
    MD5: 9e9bef9ca073137d00549f0f0811faea
 
PPC:
pam_krb5-2.2.14-1.el5_2.1.ppc.rpm
File outdated by:  RHBA-2012:0246
    MD5: 93ebeb7ff9a184feaa675edde0318daa
pam_krb5-2.2.14-1.el5_2.1.ppc64.rpm
File outdated by:  RHBA-2012:0246
    MD5: 4cb5db724897dc776f19fafa7252abfd
 
s390x:
pam_krb5-2.2.14-1.el5_2.1.s390.rpm
File outdated by:  RHBA-2012:0246
    MD5: 142ffe7fcb0ac754adff91434a47e92b
pam_krb5-2.2.14-1.el5_2.1.s390x.rpm
File outdated by:  RHBA-2012:0246
    MD5: 363888d9a7c543633ec4357309dbea21
 
x86_64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
File outdated by:  RHBA-2012:0246
    MD5: 47c08c28a7b8535a27e9681ad929e6b9
pam_krb5-2.2.14-1.el5_2.1.x86_64.rpm
File outdated by:  RHBA-2012:0246
    MD5: 9f43550e3525829bccf848b31dbd9dff
 
Red Hat Enterprise Linux Desktop (v. 5 client)

SRPMS:
pam_krb5-2.2.14-1.el5_2.1.src.rpm
File outdated by:  RHBA-2012:0246
    MD5: cb49da099c31a7c980379e69f11f74cf
 
IA-32:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
File outdated by:  RHBA-2012:0246
    MD5: 47c08c28a7b8535a27e9681ad929e6b9
 
x86_64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm
File outdated by:  RHBA-2012:0246
    MD5: 47c08c28a7b8535a27e9681ad929e6b9
pam_krb5-2.2.14-1.el5_2.1.x86_64.rpm
File outdated by:  RHBA-2012:0246
    MD5: 9f43550e3525829bccf848b31dbd9dff
 
Red Hat Enterprise Linux EUS (v. 5.2.z server)

SRPMS:
pam_krb5-2.2.14-1.el5_2.1.src.rpm
File outdated by:  RHBA-2012:0246
    MD5: cb49da099c31a7c980379e69f11f74cf
 
IA-32:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm     MD5: 47c08c28a7b8535a27e9681ad929e6b9
 
IA-64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm     MD5: 47c08c28a7b8535a27e9681ad929e6b9
pam_krb5-2.2.14-1.el5_2.1.ia64.rpm     MD5: 9e9bef9ca073137d00549f0f0811faea
 
PPC:
pam_krb5-2.2.14-1.el5_2.1.ppc.rpm     MD5: 93ebeb7ff9a184feaa675edde0318daa
pam_krb5-2.2.14-1.el5_2.1.ppc64.rpm     MD5: 4cb5db724897dc776f19fafa7252abfd
 
s390x:
pam_krb5-2.2.14-1.el5_2.1.s390.rpm     MD5: 142ffe7fcb0ac754adff91434a47e92b
pam_krb5-2.2.14-1.el5_2.1.s390x.rpm     MD5: 363888d9a7c543633ec4357309dbea21
 
x86_64:
pam_krb5-2.2.14-1.el5_2.1.i386.rpm     MD5: 47c08c28a7b8535a27e9681ad929e6b9
pam_krb5-2.2.14-1.el5_2.1.x86_64.rpm     MD5: 9f43550e3525829bccf848b31dbd9dff
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

461960 - CVE-2008-3825 pam_krb5 existing_ticket permission flaw


References



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

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/