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--------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated PAM packages fix bug in pam_xauth module Advisory ID: RHSA-2003:035-10 Issue date: 2003-02-07 Updated on: 2003-02-12 Product: Red Hat Linux Keywords: pam_xauth root cookies Cross references: RHSA-2003:028 Obsoletes: CVE Names: CAN-2002-1160 --------------------------------------------------------------------- 1. Topic: Updated PAM packages are now available for Red Hat Linux 7.1, 7.2, 7.3, and 8.0. These packages correct a bug in pam_xauth's handling of authorization data for the root user. 2. Relevant releases/architectures: Red Hat Linux 7.1 - i386 Red Hat Linux 7.2 - i386, ia64 Red Hat Linux 7.3 - i386 Red Hat Linux 8.0 - i386 3. Problem description: The pam_xauth module is used to forward xauth information from user to user in applications such as 'su'. Andreas Beck discovered that versions of pam_xauth supplied with Red Hat Linux since version 7.1 would forward authorization information from the root account to unprivileged users. This could be used by a local attacker to gain access to an administrator's X session. In order to exploit this vulnerability, the attacker would have to get the administrator, as root, to use su to the account belonging to the attacker. Users of pam_xauth are advised to upgrade to these errata packages, which contain a patch that adds ACL (access control list) functionality to pam_xauth and disallows root forwarding by default. Versions of pam_xauth included in Red Hat Linux 7 and earlier disabled passing of credentials from the root account to unprivileged users by default and are not affected by this issue. Thanks to Andreas Beck for reporting this issue. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. To update all RPMs for your particular architecture, run: rpm -Fvh [filenames] where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory only contains the desired RPMs. Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. 5. RPMs required: Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/pam-0.75-46.7.1.src.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/pam-0.75-46.7.1.i386.rpm ftp://updates.redhat.com/7.1/en/os/i386/pam-devel-0.75-46.7.1.i386.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/pam-0.75-46.7.2.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/pam-0.75-46.7.2.i386.rpm ftp://updates.redhat.com/7.2/en/os/i386/pam-devel-0.75-46.7.2.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/pam-0.75-46.7.2.ia64.rpm ftp://updates.redhat.com/7.2/en/os/ia64/pam-devel-0.75-46.7.2.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/pam-0.75-46.7.3.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/pam-0.75-46.7.3.i386.rpm ftp://updates.redhat.com/7.3/en/os/i386/pam-devel-0.75-46.7.3.i386.rpm Red Hat Linux 8.0: SRPMS: ftp://updates.redhat.com/8.0/en/os/SRPMS/pam-0.75-46.8.0.src.rpm i386: ftp://updates.redhat.com/8.0/en/os/i386/pam-0.75-46.8.0.i386.rpm ftp://updates.redhat.com/8.0/en/os/i386/pam-devel-0.75-46.8.0.i386.rpm 6. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 4a869dd0efd82fb9f098cc4284263aeb 7.1/en/os/SRPMS/pam-0.75-46.7.1.src.rpm 2ee6c4e7c9c59efdf3e31c8d9482a30a 7.1/en/os/i386/pam-0.75-46.7.1.i386.rpm 0d8f6cb6d0f293cb174f3e376c21eb1d 7.1/en/os/i386/pam-devel-0.75-46.7.1.i386.rpm fcbe7194fc12466d4532b213373c3ce6 7.2/en/os/SRPMS/pam-0.75-46.7.2.src.rpm 7d16c011e4f74e8e02bb8c193506186d 7.2/en/os/i386/pam-0.75-46.7.2.i386.rpm 0919b62d8d7531883d6e01f5ff3a51b6 7.2/en/os/i386/pam-devel-0.75-46.7.2.i386.rpm e653e3ff25eb958570b411d201b5106e 7.2/en/os/ia64/pam-0.75-46.7.2.ia64.rpm 8f4d0dc64cdbded20c46a38460e6affe 7.2/en/os/ia64/pam-devel-0.75-46.7.2.ia64.rpm 99751631043fbe42f98f8598e74e6d4b 7.3/en/os/SRPMS/pam-0.75-46.7.3.src.rpm 8ea6d868c28c22d629d2059f1ad72f1b 7.3/en/os/i386/pam-0.75-46.7.3.i386.rpm 9fef754632838504c0590ba30203a925 7.3/en/os/i386/pam-devel-0.75-46.7.3.i386.rpm 1b74821ca4fd0b7a9919c3b0fdf3dbb3 8.0/en/os/SRPMS/pam-0.75-46.8.0.src.rpm 25ebcb39f56c98cc064c34b2d048ed35 8.0/en/os/i386/pam-0.75-46.8.0.i386.rpm f6412156d54a4021a3200eb7d7ff79c0 8.0/en/os/i386/pam-devel-0.75-46.8.0.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at http://www.redhat.com/about/contact/pgpkey.html You can verify each package with the following command: rpm --checksig -v <filename> If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: md5sum <filename> 7. References: http://www.redhat.com/support/wpapers/redhat/newpam/tinkering.html http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1160 8. Contact: The Red Hat security contact is <security@redhat.com>. More contact details at http://www.redhat.com/solutions/security/news/contact.html --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: Updated fileutils package fixes race condition in recursive operations Advisory ID: RHSA-2003:015-05 Issue date: 2003-01-21 Updated on: 2003-02-12 Product: Red Hat Linux Keywords: rm move gnu mv remove Cross references: Obsoletes: CVE Names: CAN-2002-0435 --------------------------------------------------------------------- 1. Topic: New fileutils packages for Red Hat Linux 6.2, 7.0, 7.1, 7.2 and 7.3 fix a race condition in recursive remove and move commands. 2. Relevant releases/architectures: Red Hat Linux 6.2 - i386 Red Hat Linux 7.0 - i386 Red Hat Linux 7.1 - i386 Red Hat Linux 7.2 - i386, ia64 Red Hat Linux 7.3 - i386 3. Problem description: The fileutils package includes a number of GNU versions of common and popular file management utilities. A race condition in the recursive use of 'rm' and 'mv' in fileutils 4.1 and earlier could allow local users to delete files and directories (as the user running fileutils) if the user has write access to part of the tree being moved or deleted. Red Hat Linux versions 6.2, 7, 7.1, 7.2, and 7.3 shipped with versions of fileutils that are vulnerable to this issue. This erratum provides new fileutils packages that contain a patch correcting this issue. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. To update all RPMs for your particular architecture, run: rpm -Fvh [filenames] where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory only contains the desired RPMs. Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. 5. RPMs required: Red Hat Linux 6.2: SRPMS: ftp://updates.redhat.com/6.2/en/os/SRPMS/fileutils-4.0-21.1.src.rpm i386: ftp://updates.redhat.com/6.2/en/os/i386/fileutils-4.0-21.1.i386.rpm Red Hat Linux 7.0: SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/fileutils-4.0x-3.1.src.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/fileutils-4.0x-3.1.i386.rpm Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/fileutils-4.0.36-4.1.src.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/fileutils-4.0.36-4.1.i386.rpm Red Hat Linux 7.2: SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/fileutils-4.1-10.1.src.rpm i386: ftp://updates.redhat.com/7.2/en/os/i386/fileutils-4.1-10.1.i386.rpm ia64: ftp://updates.redhat.com/7.2/en/os/ia64/fileutils-4.1-10.1.ia64.rpm Red Hat Linux 7.3: SRPMS: ftp://updates.redhat.com/7.3/en/os/SRPMS/fileutils-4.1-10.1.src.rpm i386: ftp://updates.redhat.com/7.3/en/os/i386/fileutils-4.1-10.1.i386.rpm 6. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 55639c22a29023720b9504fda5c8614e 6.2/en/os/SRPMS/fileutils-4.0-21.1.src.rpm cacc930476d0338f406ecead3dcf952b 6.2/en/os/i386/fileutils-4.0-21.1.i386.rpm 7c7f227ab74bde72f3412107ba63ba62 7.0/en/os/SRPMS/fileutils-4.0x-3.1.src.rpm 37887ea82f67399490cf04f30727078f 7.0/en/os/i386/fileutils-4.0x-3.1.i386.rpm fe03cd0ec3fc7a0cd6f22872704c4390 7.1/en/os/SRPMS/fileutils-4.0.36-4.1.src.rpm 24bcfd92b6298dc3510a4cbfdf812a96 7.1/en/os/i386/fileutils-4.0.36-4.1.i386.rpm 4357c82173c6ad064119cdf265f6162e 7.2/en/os/SRPMS/fileutils-4.1-10.1.src.rpm d8a014f87a6aa623c36620ba96178698 7.2/en/os/i386/fileutils-4.1-10.1.i386.rpm 3c7c5fd690854ba5655717583883ddc5 7.2/en/os/ia64/fileutils-4.1-10.1.ia64.rpm 4357c82173c6ad064119cdf265f6162e 7.3/en/os/SRPMS/fileutils-4.1-10.1.src.rpm d8a014f87a6aa623c36620ba96178698 7.3/en/os/i386/fileutils-4.1-10.1.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at http://www.redhat.com/about/contact/pgpkey.html You can verify each package with the following command: rpm --checksig -v <filename> If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: md5sum <filename> 7. References: http://online.securityfocus.com/archive/1/260936 http://mail.gnu.org/archive/html/bug-fileutils/2002-03/msg00028.html http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0435 8. Contact: The Red Hat security contact is <security@redhat.com>. More contact details at http://www.redhat.com/solutions/security/news/contact.html Copyright 2003 Red Hat, Inc.