ClamAV and Kolab Server RTF file denial of service

clamav-rtf-dos (36173) The risk level is classified as MediumMedium Risk

Description:

Clam AntiVirus (ClamAV) and Kolab Server are vulnerable to a denial of service, caused by a NULL pointer dereference in the libclamav/rtf.c. script's cli_scanrtf function. By persuading a victim to scan a specially-crafted RTF file, 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-25398: ClamAV Multiple Remote Denial of Service Vulnerabilities
  • BID-5398: Multiple Vendor calloc() Implementation Integer Overflow Vulnerability
  • 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

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

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