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AUSCERT External Security Bulletin Redistribution
ESB-2023.0935
ClamAV DMG File Parsing XML Entity Expansion Vulnerability
Affecting Cisco Products: February 2023
16 February 2023
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Secure Endpoint
Secure Endpoint Private Cloud
Publisher: Cisco Systems
Operating System: Cisco
Windows
macOS
Linux variants
Resolution: Patch/Upgrade
CVE Names: CVE-2023-20052
Original Bulletin:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-xxe-TcSZduhN
Comment: CVSS (Max): None available when published
- --------------------------BEGIN INCLUDED TEXT--------------------
ClamAV DMG File Parsing XML Entity Expansion Vulnerability Affecting Cisco
Products: February 2023
Priority: Medium
Advisory ID: cisco-sa-clamav-xxe-TcSZduhN
First Published: 2023 February 15 16:00 GMT
Last Updated: 2023 February 15 20:15 GMT
Version 1.1: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCwd87111 CSCwd87112 CSCwd87113
CVE Names: CVE-2023-20052
Summary
o On Feb 15, 2023, the following vulnerability in the ClamAV scanning library
was disclosed:
A vulnerability in the DMG file parser of ClamAV versions 1.0.0 and
earlier, 0.105.1 and earlier, and 0.103.7 and earlier could allow an
unauthenticated, remote attacker to access sensitive information on an
affected device.
This vulnerability is due to enabling XML entity substitution that may
result in XML external entity injection. An attacker could exploit this
vulnerability by submitting a crafted DMG file to be scanned by ClamAV on
an affected device. A successful exploit could allow the attacker to leak
bytes from any file that may be read by the ClamAV scanning process.
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-xxe-TcSZduhN
Affected Products
o Cisco investigated its product line to determine which products may be
affected by this vulnerability.
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, including workarounds (if
available) and fixed software releases.
Any product not listed in the Vulnerable Products section of this advisory
is to be considered not vulnerable.
Vulnerable Products
The following table lists Cisco products that are affected by the
vulnerability that is described in this advisory. If a future release date
is indicated for software, the date provided represents an estimate based
on all information known to Cisco as of the Last Updated date at the top of
the advisory. Availability dates are subject to change based on a number of
factors, including satisfactory testing results and delivery of other
priority features and fixes.
Cisco Product Cisco Bug Fixed Release
ID Availability
Secure Endpoint, formerly Advanced Malware CSCwd87111 1.20.2 ^1
Protection (AMP) for Endpoints, for Linux
Secure Endpoint, formerly Advanced Malware CSCwd87112 1.21.1 ^1
Protection (AMP) for Endpoints, for MacOS
Secure Endpoint, formerly Advanced Malware 7.5.9 ^1
Protection (AMP) for Endpoints, for CSCwd87113 8.1.5
Windows
Secure Endpoint Private Cloud CSCwe18204 3.6.0 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.
Attention: Simplifying the Cisco portfolio includes the renaming of
security products under one brand: Cisco Secure. For more information, see
Meet Cisco Secure .
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:
Secure Email Gateway, formerly Email Security Appliance
Secure Email and Web Manager, formerly Security Management Appliance
Secure Web Appliance, formerly Web Security Appliance
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) or their contracted maintenance
providers.
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 Cisco would like to thank Simon Scannell for reporting this vulnerability.
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-xxe-TcSZduhN
Revision History
o +---------+------------------------------+---------+--------+-------------+
| Version | Description | Section | Status | Date |
+---------+------------------------------+---------+--------+-------------+
| 1.1 | Changed date of ClamAV | Summary | Final | 2023-FEB-15 |
| | disclosure to February 15. | | | |
+---------+------------------------------+---------+--------+-------------+
| 1.0 | Initial public release. | - | Final | 2023-FEB-15 |
+---------+------------------------------+---------+--------+-------------+
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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