Summary

• A vulnerability in the AutoIt module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. 

  This vulnerability is due to a logic error in the memory management of an affected device. An attacker could exploit this vulnerability by submitting a crafted AutoIt file to be scanned by ClamAV on the affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to restart unexpectedly, resulting in a DoS condition.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  For a description of this vulnerability, see the ClamAV blog.

  This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-dos-FTkhqMWZ

Affected Products

• The Vulnerable Products section includes Cisco bug IDs for each affected product. The bugs are accessible through the Cisco Bug Search Tool and contain additional platform-specific information and fixed software releases. 

  Vulnerable Products

  The following table lists Cisco products that are affected by the vulnerability that is described in this advisory. Customers should refer to the associated Cisco bug IDs for further details.

  Affected Cisco Software Platform	CVSS Base Score	Security Impact Rating	Cisco Bug ID	First Fixed Release
  Secure Endpoint Connector for Windows	7.5	High	CSCwf30972	8.1.7.215851
  Secure Endpoint Private Cloud	7.5	High	CSCwf30973	3.8.0 or later with updated connectors

  1. This vulnerability affects the Secure Endpoint Connector for Windows releases between Release 8.1.5.21322 and the first fixed release.

  Products Confirmed Not Vulnerable

  Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.

  Cisco has confirmed that this vulnerability does not affect the following Cisco products:

  • Firepower Threat Defense Software
  • Secure Endpoint Connector for Linux
  • Secure Endpoint Connector for MacOS
  • Secure Email Appliance, formerly Email Security Appliance
  • Secure Web Appliance

  Attention: Simplifying the Cisco portfolio includes the renaming of security products under one brand: Cisco Secure. For more information, see Meet Cisco Secure.

Details

• Details about the potential effects of the vulnerability are as follows:

  Impacts of ClamAV DoS Vulnerability on Windows Platforms

  The Security Impact Rating (SIR) for this vulnerability is High only for Windows-based platforms because those platforms run the ClamAV scanning process as a service that could fail and restart, delaying scanning operations. See the Assessing Security Risk section of the Cisco Security Vulnerability Policy for information about vulnerability scoring and SIRs.

  A vulnerability in the AutoIT module of ClamAV could allow an attacker to cause the application to crash, resulting in a DoS condition on an affected device. Cisco Secure Endpoint Connector for Windows, which is distributed from Cisco Secure Endpoint Private Cloud, is affected by this vulnerability.

  Bug ID(s): CSCwf30972 and CSCwf30973
  Security Impact Rating (SIR): High
  CVSS Base Score: 7.5
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Workarounds

• There are no workarounds that address this vulnerability.

Fixed Software

• For information about fixed software releases, consult the Cisco bugs identified in the Vulnerable Products section of this advisory. 

  When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.

  In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) for their contracted maintenance providers.

  Fixed Releases

  Customers are advised to upgrade to an appropriate fixed software release as indicated in the following tables:

  Affected Cisco Software Platform	First Fixed Release
  Secure Endpoint Connector for Windows	8.1.7.215851
  Secure Endpoint Private Cloud	3.8.0 or later with updated connectors2

  1. Updated releases of Cisco Secure Endpoint are available through the Cisco Secure Endpoint portal. Depending on the configured policy, Cisco Secure Endpoint will automatically update.

  2. Affected releases of Cisco Secure Endpoint clients for Cisco Secure Endpoint Private Cloud have been updated in the connectors repository. Customers will get these connector updates through normal content update processes.

  The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.

Exploitation and Public Announcements

• The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Source

• This vulnerability was found during internal security testing.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-dos-FTkhqMWZ

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	—	Final	2023-AUG-16

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