Red Hat, Inc. Security Advisory



   Synopsis: New version of usermode fixes security bug

   Advisory ID: RHSA-2000:001-01

   Issue date: 2000-01-04

   Updated on: 2000-01-04

   Keywords: root userhelper pam

   Cross references:







   1. Topic:



   A security bug has been discovered and fixed in the userhelper program.



   2. Relevant releases/architectures:



   Red Hat Linux 6.0 and 6.1, all architectures.



   3. Problem description:



   A security bug was found in userhelper; the bug can be exploited to

provide local

   users with root access.



   The bug has been fixed in userhelper-1.17, and pam-0.68-10 has been

modified to

   help prevent similar attacks on other software in the future.



   4. Solution:



   For each RPM for your particular architecture, run:

   rpm -Uvh

   where filename is the name of the RPM.



   5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla/ for more info):



   6. Obsoleted by:



   7. Conflicts with:



   8. RPMs required:



   Intel:

   ftp://updates.redhat.com/6.1/i386/pam-0.68-10.i386.rpm

   ftp://updates.redhat.com/6.1/i386/usermode-1.17-1.i386.rpm



   Alpha:

   ftp://updates.redhat.com/6.1/alpha/pam-0.68-10.alpha.rpm

   ftp://updates.redhat.com/6.1/alpha/usermode-1.17-1.alpha.rpm



   Sparc:

   ftp://updates.redhat.com/6.1/sparc/pam-0.68-10.sparc.rpm

   ftp://updates.redhat.com/6.1/sparc/usermode-1.17-1.sparc.rpm



   Source packages:

   ftp://updates.redhat.com/6.1/SRPMS/pam-0.68-10.src.rpm

   ftp://updates.redhat.com/6.1/SRPMS/usermode-1.17-1.src.rpm



   9. Verification:



   MD5 sum                           Package Name





   bffd4388103fa99265e267eab7ae18c8 i386/pam-0.68-10.i386.rpm

   2d69859d2b1d2180d254fc263bdccf94 i386/usermode-1.17-1.i386.rpm

   fed2c2ad4f95829e14727a9dfceaca07 alpha/pam-0.68-10.alpha.rpm

   83c69cb92b16bb0eef295acb4c857657 alpha/usermode-1.17-1.alpha.rpm

   350662253d09b17d0aca4e9c7a511675 sparc/pam-0.68-10.sparc.rpm

   d89495957c9a438fda657b8a4a5f5578 sparc/usermode-1.17-1.sparc.rpm

   f9ad800f56b7bb05ce595bad824a990d SRPMS/pam-0.68-10.src.rpm

   1d3b367d257a57de7d834043a4fcd87a SRPMS/usermode-1.17-1.src.rpm



   These packages are GPG signed by Red Hat, Inc. for security. Our key is

available

   at:

   http://www.redhat.com/corp/contact.html



   You can verify each package with the following command:

   rpm --checksig



   If you only wish to verify that each package has not been corrupted or

tampered

   with, examine only the md5sum with the following command:

   rpm --checksig --nogpg



   10. References:



   Thanks to dildog@l0pht.com for finding this bug.