ClamAV and Kolab Server cli_html_normalise() denial of service
| clamav-clihtmlnormalise-dos (36177) |  Low Risk |
Description:
Clam AntiVirus (ClamAV) and Kolab Server are vulnerable to a denial of service, caused by a NULL pointer dereference in the libclamav/htmlnorm.c file's cli_html_normalise function. By persuading a victim to scan a specially-crafted HTML file containing a malicious data URL, an attacker could exploit this vulnerability to cause a denial of service.
Platforms Affected:
- Apple, Mac OS X Server 10.4.11
- Apple, Mac OS X Server 10.5.2
- Clam Anti-Virus, ClamAV prior to 0.91.2
- Debian, Debian Linux 4.0
- Gentoo, Linux
- Kolab, Kolab Server 2.0.4 and prior
- Kolab, Kolab Server 2.1.0 and prior
- Kolab, Kolab Server 2.2-beta1
- MandrakeSoft, Mandrake Linux 2007
- MandrakeSoft, Mandrake Linux 2007 X86_64
- MandrakeSoft, Mandrake Linux 2007.1 X86_64
- MandrakeSoft, Mandrake Linux 2007.1
- MandrakeSoft, Mandrake Linux 2008.0 X86_64
- 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
- SuSE, SuSE Linux
Remedy:
For ClamAV:
Upgrade to the latest version of ClamAV (0.91.2 or later), available from SourceForge.net : Files. See References.
For Kolab Server:
Refer to Kolab Security Issue 17 20070821 for patch, upgrade, or suggested workaround information. See References.
For SUSE Linux (clamav):
Refer to SUSE-SR:2007:018 for patch, upgrade, or suggested workaround information. See References.
For Mandriva Linux (clamav):
Refer to MDKSA-2007:172 for patch, upgrade, or suggested workaround information. See References.
For Debian GNU/Linux (clamav):
Refer to DSA-1366-1 for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux (clamav):
Refer to GLSA 200709-14 for patch, upgrade, or suggested workaround information. See References.
For Mac OS X:
Apply Security Update 2008-002, available from the Apple Web site. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- Apple Web site, About Security Update 2008-002 at http://docs.info.apple.com/article.html?artnum=307562.
- Kolab Security Issue 17 20070821, Kolab Server, ClamAV at http://kolab.org/security/kolab-vendor-notice-17.txt.
- SourceForge.net : Files, Clam AntiVirus - File Release Notes and Changelog - Release Name: 0.91.2 at http://sourceforge.net/project/shownotes.php?release_id=533658&group_id=86638.
- BID-23598: Allfaclassifieds Level2.PHP Remote File Include Vulnerability
- BID-25398: ClamAV Multiple Remote Denial of Service Vulnerabilities
- CVE-2007-4510: ClamAV before 0.91.2, as used in Kolab Server 2.0 through 2.2beta1 and other products, allows remote attackers to cause a denial of service (application crash) via (1) a crafted RTF file, which triggers a NULL dereference in the cli_scanrtf function in libclamav/rtf.c; or (2) a crafted HTML document with a data: URI, which triggers a NULL dereference in the cli_html_normalise function in libclamav/htmlnorm.c. NOTE: some of these details are obtained from third party information.
- DSA-1366: clamav -- several vulnerabilities
- GLSA-200709-14: ClamAV: Multiple vulnerabilities
- MDKSA-2007:172: Updated clamav packages vulnerabilities
- SA26530: ClamAV Multiple Vulnerabilities
- SA26552: Kolab Server ClamAV Multiple Denial of Service Vulnerabilities
- SA29420: Mac OS X Security Update Fixes Multiple Vulnerabilities
- SUSE-SR:2007:018: SUSE Security Summary Report
- VUPEN/ADV-2007-2952: Clam AntiVirus Multiple Denial of Service And Code Execution Vulnerabilities
- VUPEN/ADV-2008-0924: Apple Mac OS X Command Execution and Security Bypass Issues
Reported:
Aug 21, 2007
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