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AUSCERT External Security Bulletin Redistribution
ESB-2023.4697
ClamAV AutoIt Module Denial of Service Vulnerability
17 August 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Secure Endpoint Connector for Windows
Secure Endpoint Private Cloud
Publisher: Cisco Systems
Operating System: Cisco
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2023-20212
Original Bulletin:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-dos-FTkhqMWZ
Comment: CVSS (Max): 7.5 CVE-2023-20212 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: Cisco Systems
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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ClamAV AutoIt Module Denial of Service Vulnerability
Priority: High
Advisory ID: cisco-sa-clamav-dos-FTkhqMWZ
First Published: 2023 August 16 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCwf30972 CSCwf30973
CVE Names: CVE-2023-20212
Summary
o 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
o 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 CVSS Security Cisco Bug First Fixed Release
Software Platform Base Impact ID
Score Rating
Secure Endpoint
Connector for 7.5 High CSCwf30972 8.1.7.21585 ^1
Windows
Secure Endpoint 7.5 High CSCwf30973 3.8.0 or later with
Private Cloud 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
o 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
o There are no workarounds that address this vulnerability.
Fixed Software
o 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 8.1.7.21585 ^1
Windows
Secure Endpoint Private Cloud 3.8.0 or later with updated connectors
^2
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
o 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
o This vulnerability was found during internal security testing.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy . This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
Subscribe to Cisco Security Notifications
o Subscribe
Related to This Advisory
o
URL
o https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-dos-FTkhqMWZ
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2023-AUG-16 |
+----------+---------------------------+----------+--------+--------------+
Legal Disclaimer
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
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