ClamAV cli_gentempfd() symlink
| clamav-cligentempfd-symlink (39335) |  Medium Risk |
Description:
Clam AntiVirus (ClamAV) could allow a local attacker to launch a symlink attack. The cli_gentempfd() function creates files in the /tmp directory with predictable filenames, caused by a race condition. A local attacker could exploit this vulnerability by creating a symbolic link from a temporary file to other files on the system, which would allow the attacker to overwrite arbitrary files on the system with the privileges of the application.
Platforms Affected:
- Clam Anti-Virus, ClamAV 0.92
- Debian, Debian Linux 4.0
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 2007.1
- MandrakeSoft, Mandrake Linux 2007.1 X86_64
- MandrakeSoft, Mandrake Linux 2008.0 X86_64
- MandrakeSoft, Mandrake Linux 2008.0
- MandrakeSoft, Mandrake Linux 2008.1 X86_64
- MandrakeSoft, Mandrake Linux 2008.1
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 4.0
- MandrakeSoft, Mandrake Linux Corporate Server 4.0 X86_64
- Novell, Linux POS 9
- Novell, Open Enterprise Server
- Novell, Open Enterprise Server
- Novell, OpenSUSE 10.2
- Novell, OpenSUSE 10.3
- Novell, SLE SDK 10 SP1
- Novell, SUSE Linux Enterprise Server 10 SP1
- Novell, SUSE Linux Enterprise Server 10
- SuSE, SLE SDK 10
- SuSE, SuSE SLES 9
Remedy:
Upgrade to the latest version of ClamAV (0.92.1 or later), available from the Clam AntiVirus Web site. See References.
Consequences:
File Manipulation
References:
- Clam AntiVirus Web site, Clam AntiVirus at http://www.clamav.net/.
- Clam AntiVirus Web site, Clam AntiVirus Download at http://www.clamav.net/download/sources.
- Full-Disclosure Mailing List, Sun, 30 Dec 2007 01:06:04 +0100, TK53 Advisory #2: Multiple vulnerabilities in ClamAV at http://seclists.org/fulldisclosure/2007/Dec/0625.html.
- BID-27064: ClamAV Multiple Insecure File Handling and Scanner Bypass Vulnerabilities
- CVE-2007-6595: ClamAV 0.92 allows local users to overwrite arbitrary files via a symlink attack on (1) temporary files used by the cli_gentempfd function in libclamav/others.c or on (2) .ascii files used by sigtool, when utf16-decode is enabled.
- DSA-1497: clamav -- several vulnerabilities
- GLSA-200808-07: ClamAV: Multiple Denials of Service
- MDVSA-2008:088: Updated clamav packages fix multiple vulnerabilities
- SECTRACK ID: 1019148: Clam AntiVirus Unsafe File Access Lets Local Users Gain Elevated Privileges
- SUSE-SA:2008:024: clamav 0.93 security update
- VUPEN/ADV-2008-0606: Kolab Security Update Fixes ClamAV Code Execution Vulnerabilities
Reported:
Dec 29, 2007
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