Stay Secure with the Latest Linux Advisories

security advisorygentoofile overwrite

Gentoo Linux: GLSA-202311-10 Important: SystemD Vulnerability Mitigation

Rootkit Hunter is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200504-25 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Rootkit Hunter: Insecure temporary file creation Date: April 26, 2005 Bugs: #90007 ID: 200504-25 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= Rootkit Hunter is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files. Background ========= Rootkit Hunter is a scanning tool to detect rootkits, backdoors and local exploits on a local machine. Rootkit Hunter uses downloaded data files to check file integrity. These files are updated via the check_update.sh script. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-forensics/rkhunter < 1.2.3-r1 > = 1.2.3-r1 Description ========== Sune Kloppenborg Jeppesen and Tavis Ormandy of the Gentoo Linux Security Team have reported that the check_update.sh script and the main rkhunter script insecurely creates several temporary files with predictable filenames. Impact ===== A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When rkhunter or the check_update.sh script runs, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user. Workaround ========= There is no known workaround at thistime. Resolution ========= All Rootkit Hunter users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =app-forensics/rkhunter-1.2.3-r1" References ========= [ 1 ] CAN-2005-1270 https://www.cve.org/CVERecord?id=CVE-CAN-2005-1270 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200504-25 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 This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org/. License ====== Copyright 2005 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.0/ . The Rootkit Hunter tool contains a security flaw associated with symlink vulnerabilities, risking unauthorized file alterations. Update your software now to eliminate this threat!. Rootkit Hunter,Gentoo Security,Symlink Vulnerability,File Overwrite. . Severity: Important. LinuxSecurity.com Team

Apr 26, 2005 •Important Gentoo