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98
security advisorymoderateRed HatRed Hat 6.x: RHSA-2000:012-05 Moderate: OpenLDAP Symlink Threat
Local users can destroy the contents of any file on any mounted filesystem. . -----BEGIN PGP SIGNED MESSAGE------ --------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: New openldap packages. Advisory ID: RHSA-2000:012-05 Issue date: 2000-04-13 Updated on: 2000-04-21 Product: Red Hat Linux Keywords: openldap startup symlink overwrite denial Cross references: N/A - ---------------------------------------------------------------------1. Topic: New openldap packages are available which fix a security vulnerability in Red Hat Linux 6.1 and 6.2. 2. Relevant releases/architectures: Red Hat Linux 6.1 - i386 alpha sparc Red Hat Linux 6.2 - i386 alpha sparc 3. Problem description: OpenLDAP follows symbolic links when creating files. The default location for these files is /usr/tmp, which is a symlink to /tmp, which in turn is a world-writable directory. Local users can destroy the contents of any file on any mounted filesystem. 4. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. Administrators with existing databases should also move their NEXTID and *.dbb files from /usr/tmp to /var/lib/ldap, and verify that the 'directory' setting in /etc/openldap/slapd.conf is changed accordingly. 5. Bug IDs fixed ( for more info): 10714 - Insecure file creation using static files which follow symlinks. 6. Obsoleted by: N/A 7. Conflicts with: N/A 8. RPMs required: Red Hat Linux 6.1: intel: alpha: sparc: sources: Red Hat Linux 6.2: intel: alpha: sparc: sources: 9. Verification: MD5 sum Package Name - --------------------------------------------------------------------------fa79c61565a72407db4695ef8468a482 6.1/alpha/openldap-1.2.9-6.alpha.rpm 058c4aa63710da7490f98da4b3cad53d 6.1/i386/openldap-1.2.9-6.i386.rpm 17fbdb33172a7884f56b4fc746b1b763 6.1/SRPMS/openldap-1.2.9-6.src.rpm 816fccd85990833f7c5dfb7f2dc6e0a1 6.1/sparc/openldap-1.2.9-6.sparc.rpm fa79c61565a72407db4695ef8468a482 6.2/alpha/openldap-1.2.9-6.alpha.rpm 816fccd85990833f7c5dfb7f2dc6e0a1 6.2/sparc/openldap-1.2.9-6.sparc.rpm 17fbdb33172a7884f56b4fc746b1b763 6.2/SRPMS/openldap-1.2.9-6.src.rpm 058c4aa63710da7490f98da4b3cad53d 6.2/i386/openldap-1.2.9-6.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 10. References: Thanks also go to Stan Bubrouski for reporting this problem. Cristian - --- ----------------------------------------------------------------------Cristian Gafton --
Jun 08, 2023
Red Hat
91
security advisorygentoolocal threatGentoo: 200411-13 Normal: Symlink Overwrite Threat in Portage & Gentoolkit
dispatch-conf (included in Portage) and qpkg (included in Gentoolkit) are vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running the script. [More...]. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200411-13:01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Portage, Gentoolkit: Temporary file vulnerabilities Date: November 07, 2004 Bugs: #68846, #69147 ID: 200411-13:01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= dispatch-conf (included in Portage) and qpkg (included in Gentoolkit) are vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running the script. Background ========= Portage is Gentoo's package management tool. The dispatch-conf utility allows for easy rollback of configuration file changes and automatic updates of configurations files never modified by users. Gentoolkit is a collection of Gentoo specific administration scripts, one of which is the portage querying tool qpkg. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-apps/portage = 2.0.51-r3 2 app-portage/gentoolkit = 0.2.0_pre10-r1 *> = 0.2.0_pre8-r1 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. ------------------------------------------------------------------- Description ========== dispatch-conf and qpkg use predictable filenames for temporary files. Impact ===== A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When an affected script is called, this would result in the file to be overwritten with the rights of the user running the dispatch-conf or qpkg, which could be the root user. Workaround ========= There is no known workaround at this time. Resolution ========= All Portage users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =sys-apps/portage-2.0.51-r3" All Gentoolkit users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =app-portage/gentoolkit-0.2.0_pre8-r1" Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200411-13 Concerns? ======== Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to
Nov 07, 2004
Gentoo
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