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Red Hat: 2000:123-01 Critical: Ed /tmp File Exploitation Risk

The ed editor used files in /tmp in an insecure fashion.. ` --------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: New ed packages available Advisory ID: RHSA-2000:123-01 Issue date: 2000-12-06 Updated on: 2000-12-06 Product: Red Hat Linux Keywords: ed mktemp mkstemp /tmp Cross references: N/A --------------------------------------------------------------------- 1. Topic: The ed editor used files in /tmp in an insecure fashion. It was possible for local users to exploit this vulnerability to modify files that they normally could not and gain elevated privilege. 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 7.0 - i386, alpha 3. Problem description: The ed executable creates files in /tmp with predictable names. By using various symlink attacks, it is possible to have ed write to files it should not, change the permissions of various files, etc. 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 ( for more info): 21470 - ed uses mktemp + fopen for scratch files 6. RPMs required: Red Hat Linux 5.2: alpha: sparc: i386: sources: Red Hat Linux 6.0: sparc: i386: alpha: sources: Red Hat Linux 6.1: alpha: sparc: i386: sources: Red Hat Linux 6.2: alpha: sparc: i386: sources: Red Hat Linux 7.0: alpha: i386: sources: 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- e87aafb1feef31ab80d5a55313cf76b4 5.2/SRPMS/ed-0.2-19.5x.src.rpm c2ff59030a1d2c9cdf7040facda48a0b 5.2/alpha/ed-0.2-19.5x.alpha.rpm 86a43f6d2b10c284f36c5d9776a56789 5.2/i386/ed-0.2-19.5x.i386.rpm b7ac2a44c3ea17f78d5313a3113f98c3 5.2/sparc/ed-0.2-19.5x.sparc.rpm e80cdbeebc4cf4d7a8b8765b02540c2e 6.0/SRPMS/ed-0.2-19.6x.src.rpm 779b42a553a66a3cf422ffe8e87bb2fb 6.0/alpha/ed-0.2-19.6x.alpha.rpm 7c584e3600331b81e8caa2422722ccae 6.0/i386/ed-0.2-19.6x.i386.rpm 007fc8f22b6cc144b3b2703744da8483 6.0/sparc/ed-0.2-19.6x.sparc.rpm e80cdbeebc4cf4d7a8b8765b02540c2e 6.1/SRPMS/ed-0.2-19.6x.src.rpm 779b42a553a66a3cf422ffe8e87bb2fb 6.1/alpha/ed-0.2-19.6x.alpha.rpm 7c584e3600331b81e8caa2422722ccae 6.1/i386/ed-0.2-19.6x.i386.rpm 007fc8f22b6cc144b3b2703744da8483 6.1/sparc/ed-0.2-19.6x.sparc.rpm e80cdbeebc4cf4d7a8b8765b02540c2e 6.2/SRPMS/ed-0.2-19.6x.src.rpm 779b42a553a66a3cf422ffe8e87bb2fb 6.2/alpha/ed-0.2-19.6x.alpha.rpm 7c584e3600331b81e8caa2422722ccae 6.2/i386/ed-0.2-19.6x.i386.rpm 007fc8f22b6cc144b3b2703744da8483 6.2/sparc/ed-0.2-19.6x.sparc.rpm f619f60ddcbeedc016b434e172b9bddb 7.0/SRPMS/ed-0.2-19.src.rpm f511af62ec15ef65dd1104683e7d39db 7.0/alpha/ed-0.2-19.alpha.rpm 6186b80b1deba06a1d3d99e30e2270d0 7.0/i386/ed-0.2-19.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: 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: N/A Copyright(c) 2000 Red Hat, Inc. `. Oracle has released a notification regarding vulnerabilities in the vim text editor related to mishandling of session data, strongly recommending users to upgrade their versions.. ed Editor Security, Red Hat Advisory, File Insecurity. . Severity: Critical. LinuxSecurity.com Team

Dec 11, 2000 •Critical Red Hat