--------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: Updated tcsh packages are now available for Red Hat Linux. Advisory ID: RHSA-2000:121-04 Issue date: 2000-11-30 Updated on: 2000-12-01 Product: Red Hat Linux Keywords: tcsh symlink vulnerability Cross references: N/A --------------------------------------------------------------------- 1. Topic: Updated tcsh packages are now available for Red Hat Linux 5.2, 6.x, and 7. 2. Relevant releases/architectures: Red Hat Linux 5.2 - i386, alpha, sparc Red Hat Linux 6.0 - i386, alpha, sparc Red Hat Linux 6.1 - i386, alpha, sparc Red Hat Linux 6.2 - i386, alpha, sparc Red Hat Linux 6.2EE - i386, alpha, sparc Red Hat Linux 7.0 - i386, alpha Red Hat Linux 7.0J - i386, alpha 3. Problem description: Versions 6.09 and below of tcsh are vulnerable to a symbolic link attack. This attack can be used to cause users to destroy the contents of any file to which they have write access. 4. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 20679 - tcsh '<<' security issue 6. RPMs required: Red Hat Linux 5.2: alpha: ftp://updates.redhat.com/5.2/alpha/tcsh-6.10-0.5.x.alpha.rpm sparc: ftp://updates.redhat.com/5.2/sparc/tcsh-6.10-0.5.x.sparc.rpm i386: ftp://updates.redhat.com/5.2/i386/tcsh-6.10-0.5.x.i386.rpm sources: ftp://updates.redhat.com/5.2/SRPMS/tcsh-6.10-0.5.x.src.rpm Red Hat Linux 6.0: sparc: ftp://updates.redhat.com/6.0/sparc/tcsh-6.10-0.6.x.sparc.rpm i386: ftp://updates.redhat.com/6.0/i386/tcsh-6.10-0.6.x.i386.rpm alpha: ftp://updates.redhat.com/6.0/alpha/tcsh-6.10-0.6.x.alpha.rpm sources: ftp://updates.redhat.com/6.0/SRPMS/tcsh-6.10-0.6.x.src.rpm Red Hat Linux 6.1: alpha: ftp://updates.redhat.com/6.1/alpha/tcsh-6.10-0.6.x.alpha.rpm sparc: ftp://updates.redhat.com/6.1/sparc/tcsh-6.10-0.6.x.sparc.rpm i386: ftp://updates.redhat.com/6.1/i386/tcsh-6.10-0.6.x.i386.rpm sources: ftp://updates.redhat.com/6.1/SRPMS/tcsh-6.10-0.6.x.src.rpm Red Hat Linux 6.2: alpha: ftp://updates.redhat.com/6.2/alpha/tcsh-6.10-0.6.x.alpha.rpm sparc: ftp://updates.redhat.com/6.2/sparc/tcsh-6.10-0.6.x.sparc.rpm i386: ftp://updates.redhat.com/6.2/i386/tcsh-6.10-0.6.x.i386.rpm sources: ftp://updates.redhat.com/6.2/SRPMS/tcsh-6.10-0.6.x.src.rpm Red Hat Linux 7.0: alpha: ftp://updates.redhat.com/7.0/alpha/tcsh-6.10-1.alpha.rpm i386: ftp://updates.redhat.com/7.0/i386/tcsh-6.10-1.i386.rpm sources: ftp://updates.redhat.com/7.0/SRPMS/tcsh-6.10-1.src.rpm 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- ef09e7d86a3ea3805fed90b4e409ce78 5.2/SRPMS/tcsh-6.10-0.5.x.src.rpm 871a2d33370517380173c327d91deb83 5.2/alpha/tcsh-6.10-0.5.x.alpha.rpm e228b2179d2917067a2267d08eb4f9f1 5.2/i386/tcsh-6.10-0.5.x.i386.rpm 8c839a90f05ab9acb4b83dc620aee644 5.2/sparc/tcsh-6.10-0.5.x.sparc.rpm 4eb03f6ac99e3e6f15fa8e0a7f680530 6.0/SRPMS/tcsh-6.10-0.6.x.src.rpm 1a05f99e1fe6d5ec091160ee8012cd07 6.0/alpha/tcsh-6.10-0.6.x.alpha.rpm 6c66a718122e2a0f79bb0f6218082ebc 6.0/i386/tcsh-6.10-0.6.x.i386.rpm eda7e5af943795c2c85050724d8f5deb 6.0/sparc/tcsh-6.10-0.6.x.sparc.rpm 4eb03f6ac99e3e6f15fa8e0a7f680530 6.1/SRPMS/tcsh-6.10-0.6.x.src.rpm 1a05f99e1fe6d5ec091160ee8012cd07 6.1/alpha/tcsh-6.10-0.6.x.alpha.rpm 6c66a718122e2a0f79bb0f6218082ebc 6.1/i386/tcsh-6.10-0.6.x.i386.rpm eda7e5af943795c2c85050724d8f5deb 6.1/sparc/tcsh-6.10-0.6.x.sparc.rpm 4eb03f6ac99e3e6f15fa8e0a7f680530 6.2/SRPMS/tcsh-6.10-0.6.x.src.rpm 1a05f99e1fe6d5ec091160ee8012cd07 6.2/alpha/tcsh-6.10-0.6.x.alpha.rpm 6c66a718122e2a0f79bb0f6218082ebc 6.2/i386/tcsh-6.10-0.6.x.i386.rpm eda7e5af943795c2c85050724d8f5deb 6.2/sparc/tcsh-6.10-0.6.x.sparc.rpm 8237e14a4430f4ca48dd4421a049bf3d 7.0/SRPMS/tcsh-6.10-1.src.rpm c4ce83f418496f40e3e802da03db3e6f 7.0/alpha/tcsh-6.10-1.alpha.rpm 1fee54c9b1fc394c03a8d960937a9747 7.0/i386/tcsh-6.10-1.i386.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 8. References: http://www.securityfocus.com/vdb/bottom.html?vid=1926 Copyright(c) 2000 Red Hat, Inc.