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[ GLSA 200706-05 ] ClamAV: Multiple Denials of Service
From: Raphael Marichez <falco () gentoo org>
Date: Fri, 15 Jun 2007 18:35:10 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200706-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: ClamAV: Multiple Denials of Service Date: June 15, 2007 Bugs: #178082 ID: 200706-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== ClamAV contains several vulnerabilities leading to a Denial of Service. Background ========== ClamAV is a GPL virus scanner. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-antivirus/clamav < 0.90.3 >= 0.90.3 Description =========== Several vulnerabilities were discovered in ClamAV by various researchers: * Victor Stinner (INL) discovered that the OLE2 parser may enter in an infinite loop (CVE-2007-2650). * A boundary error was also reported by an anonymous researcher in the file unsp.c, which might lead to a buffer overflow (CVE-2007-3023). * The file unrar.c contains a heap-based buffer overflow via a modified vm_codesize value from a RAR file (CVE-2007-3123). * The RAR parsing engine can be bypassed via a RAR file with a header flag value of 10 (CVE-2007-3122). * The cli_gentempstream() function from clamdscan creates temporary files with insecure permissions (CVE-2007-3024). Impact ====== A remote attacker could send a specially crafted file to the scanner, possibly triggering one of the vulnerabilities. The two buffer overflows are reported to only cause Denial of Service. This would lead to a Denial of Service by CPU consumption or a crash of the scanner. The insecure temporary file creation vulnerability could be used by a local user to access sensitive data. Workaround ========== There is no known workaround at this time. Resolution ========== All ClamAV users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.90.3" References ========== [ 1 ] CVE-2007-2650 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2650 [ 2 ] CVE-2007-3023 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3023 [ 3 ] CVE-2007-3024 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3024 [ 4 ] CVE-2007-3122 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3122 [ 5 ] CVE-2007-3123 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3123 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200706-05.xml 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 security () gentoo org or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2007 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. http://creativecommons.org/licenses/by-sa/2.5
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- [ GLSA 200706-05 ] ClamAV: Multiple Denials of Service Raphael Marichez (Jun 15)