ClamAV and Kolab Server cli_html_normalise() denial of service
| clamav-clihtmlnormalise-dos (36177) |  Medium 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.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.2 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
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.
References:
- Apple Web site: About Security Update 2008-002.
- Kolab Security Issue 17 20070821: Kolab Server, ClamAV.
- SourceForge.net : Files: Clam AntiVirus - File Release Notes and Changelog - Release Name: 0.91.2.
- 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
Platforms Affected:
- Apple Mac OS X Server 10.4.11
- Apple Mac OS X Server 10.5.2
- ClamAV ClamAV prior to 0.91.2
- Debian Debian Linux 4.0
- Gentoo Linux
- Kolab Kolab Server 2.0.4
- Kolab Kolab Server 2.1.0
- 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 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- SUSE SuSE Linux
Reported:
Aug 21, 2007
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email ignore thisxforceignore this@ignore thisus.ignore thisibm.comignore this
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.