Date: Fri, 14 Apr 2000 11:47:23 -0700 From: Katie Moussouris <k8e@MAIL.TURBOLINUX.COM> Subject: [TL-Security-Announce] PAM and usermode TLSA2000009-1 To: BUGTRAQ@SECURITYFOCUS.COM -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ TurboLinux Security Announcement Package: pam-0.70-2 and earlier; usermode-1.6-1 and earlier Date: Fri Apr 14 10:49:07 PDT 2000 Affected TurboLinux versions: 6.0.2 and earlier Vulnerability Type: local root compromise TurboLinux Advisory ID#: TLSA2000009-1 BugTraq ID#: 913 Credits: This vulnerability was posted to Bugtraq in a L0pht security advisory written by Dildog on January 4, 2000. ______________________________________________________________________________ A security hole was discovered in the packages mentioned above. Please update the packages in your installation as soon as possible or disable the service. _____________________________________________________________________________ 1. Problem Summary Nobody says it like Dildog: "Both 'pam' and 'userhelper' (a setuid binary that comes with the 'usermode-1.15' rpm) follow .. paths. Since pam_start calls down to _pam_add_handler(), we can get it to dlopen any file on disk. 'userhelper' being setuid means we can get root." 2. Impact A local user can use this vulnerability to get root. 3. Solution Update the packages from our ftp server by running the following command: rpm -Fvh ftp_path_to_filename Where ftp_path_to_filename is the following: ftp://ftp.turbolinux.com/pub/updates/6.0/security/pam-0.72-3.i386.rpm Run the above command again, where ftp_path_to_filename is: ftp://ftp.turbolinux.com/pub/updates/6.0/security/usermode-1.18-1.i386.rpm The source rpms can be downloaded here: ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/pam-0.72-3.src.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/usermode-1.18-1.src.rpm **Note: You must rebuild and install the rpm if you choose to download and install the srpm. Simply installing the srpm alone WILL NOT CLOSE THE SECURITY HOLE. Please verify the md5 checksum of the update before you install: MD5 sum Package Name - ------------------------------------------------------------ 91828f6e10423ae7ccae8496b418ad9a pam-0.72-3.i386.rpm 5f24ee48a6f3c6c4760150a1b00b98e9 usermode-1.18-1.i386.rpm 9d6fc46f0b3ce68c8398e152d20e142d pam-0.72-3.src.rpm 85f7906172a00718f0bf30cb76fee945 usermode-1.18-1.src.rpm ______________________________________________________________________________ These packages are GPG signed by Turbolinux for security. Our key is available here: http://www.turbolinux.com/security/tlgpgkey.asc To verify a package, use the following command: rpm --checksig name_of_rpm To examine only the md5sum, use the following command: rpm --checksig --nogpg name_of_rpm **Note: Checking GPG keys requires RPM 3.0 or higher. ______________________________________________________________________________ You can find more updates on our ftp server: ftp://ftp.turbolinux.com/pub/updates/6.0/security/ for TL6.0 Workstation and Server security updates ftp://ftp.turbolinux.com/pub/updates/4.0/security/ for TL4.0 Workstation and Server security updates Our webpage for security announcements: http://www.turbolinux.com/security If you want to report vulnerabilities, please contact: rt-security@turbolinux.com ______________________________________________________________________________ Subscribe to the TurboLinux Security Mailing lists: TL-security - A moderated list for discussing security issues in TurboLinux products. Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security TL-security-announce - An announce-only mailing list for security updates and alerts. Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security-announce ______________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.1 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE492Wo7eR7bnHQKeQRAk4sAJ9gImUuuFqff4YM1x7k8hr+ozzc/ACgnWKk QOWWLFKz9QkNf7a3vLC4xMQ= =+qYX -----END PGP SIGNATURE----- _______________________________________________ TL-Security-Announce mailing list TL-Security-Announce@www.turbolinux.com http://www.turbolinux.com/mailman/listinfo/tl-security-announce