Mandrake alert: Updated pam packages fix root authorization handling in pam_xauth module
Andreas Beck discovered that the pam_xauth module would forward authorization information from the root account to unprivileged users. This can be exploited by a local attacker to gain access to the root user's X session. In order for it to be successfully exploited, the attacker would have to somehow get the root user to su to the account belonging to the attacker. Update: The previous fix was incorrect because certain applications, such as userdrake and net_monitor could not be executed as root, although they could be executed as users who successfully authenticated as root.
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
________________________________________________________________________
Mandrake Linux Security Update Advisory
________________________________________________________________________
Package name: pam
Advisory ID: MDKSA-2003:017-1
Date: April 28th, 2003
Original Advisory Date: February 18th, 2003
Affected versions: 8.2, 9.0, Corporate Server 2.1,
Multi Network Firewall 8.2
________________________________________________________________________
Problem Description:
Andreas Beck discovered that the pam_xauth module would forward
authorization information from the root account to unprivileged users.
This can be exploited by a local attacker to gain access to the root
user's X session. In order for it to be successfully exploited, the
attacker would have to somehow get the root user to su to the account
belonging to the attacker.
Update:
The previous fix was incorrect because certain applications, such as
userdrake and net_monitor could not be executed as root, although they
could be executed as users who successfully authenticated as root.
________________________________________________________________________
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1160
________________________________________________________________________
Updated Packages:
Corporate Server 2.1:
642e1ead88ac4679f9bbad1d8174a79b corporate/2.1/RPMS/pam-0.75-25.2mdk.i586.rpm
47879bd2cd7468565296c804214e7fa4 corporate/2.1/RPMS/pam-devel-0.75-25.2mdk.i586.rpm
e421f141318950a00d5efd745726643a corporate/2.1/RPMS/pam-doc-0.75-25.2mdk.i586.rpm
aeddf8bd57bf469e2a1ff293471c7585 corporate/2.1/SRPMS/pam-0.75-25.2mdk.src.rpm
Mandrake Linux 8.2:
709506d5d500486efcc5d35a543fe9b3 8.2/RPMS/pam-0.75-25.2mdk.i586.rpm
9371a15d63964d3dce4181482afdbed5 8.2/RPMS/pam-devel-0.75-25.2mdk.i586.rpm
44e824293900efca4d55d659d4d5a217 8.2/RPMS/pam-doc-0.75-25.2mdk.i586.rpm
aeddf8bd57bf469e2a1ff293471c7585 8.2/SRPMS/pam-0.75-25.2mdk.src.rpm
Mandrake Linux 8.2/PPC:
525eed58c1581c301a57489164d7a698 ppc/8.2/RPMS/pam-0.75-25.2mdk.ppc.rpm
7db1aed626b2413e0f3c1b4c555de6dd ppc/8.2/RPMS/pam-devel-0.75-25.2mdk.ppc.rpm
88ce92857b13e18100cf42091f3f0fee ppc/8.2/RPMS/pam-doc-0.75-25.2mdk.ppc.rpm
aeddf8bd57bf469e2a1ff293471c7585 ppc/8.2/SRPMS/pam-0.75-25.2mdk.src.rpm
Mandrake Linux 9.0:
642e1ead88ac4679f9bbad1d8174a79b 9.0/RPMS/pam-0.75-25.2mdk.i586.rpm
47879bd2cd7468565296c804214e7fa4 9.0/RPMS/pam-devel-0.75-25.2mdk.i586.rpm
e421f141318950a00d5efd745726643a 9.0/RPMS/pam-doc-0.75-25.2mdk.i586.rpm
aeddf8bd57bf469e2a1ff293471c7585 9.0/SRPMS/pam-0.75-25.2mdk.src.rpm
Multi Network Firewall 8.2:
709506d5d500486efcc5d35a543fe9b3 mnf8.2/RPMS/pam-0.75-25.2mdk.i586.rpm
aeddf8bd57bf469e2a1ff293471c7585 mnf8.2/SRPMS/pam-0.75-25.2mdk.src.rpm
________________________________________________________________________
Bug IDs fixed (see https://qa.mandrakesoft.com for more information):
________________________________________________________________________
To upgrade automatically, use MandrakeUpdate. The verification of md5
checksums and GPG signatures is performed automatically for you.
If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm". A list of
FTP mirrors can be obtained from:
http://www.mandrakesecure.net/en/ftp.php
Please verify the update prior to upgrading to ensure the integrity of
the downloaded package. You can do this with the command:
rpm --checksig <filename>
All packages are signed by MandrakeSoft for security. You can obtain
the GPG public key of the Mandrake Linux Security Team from:
https://www.mandrakesecure.net/RPM-GPG-KEYS
Please be aware that sometimes it takes the mirrors a few hours to
update.
You can view other update advisories for Mandrake Linux at:
http://www.mandrakesecure.net/en/advisories/
MandrakeSoft has several security-related mailing list services that
anyone can subscribe to. Information on these lists can be obtained by
visiting:
http://www.mandrakesecure.net/en/mlist.php
If you want to report vulnerabilities, please contact
security_linux-mandrake.com
Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Linux Mandrake Security Team
<security linux-mandrake.com>
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