Mandrake alert: Updated pam packages fix root authorization handling in pam_xauth module

Posted by dave on Apr 28, 2003 5:00 PM EDT
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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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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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