CVE-2023-20052: Cisco Security Advisory: ClamAV DMG File Parsing XML Entity Expansion Vulnerability Affecting Cisco Products: February 2023

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Summary

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• 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

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Affected Products

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• 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.

  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 ID

  Fixed Release Availability

  Secure Endpoint, formerly Advanced Malware Protection (AMP) for Endpoints, for Linux

  CSCwd87111

  1.20.21

  Secure Endpoint, formerly Advanced Malware Protection (AMP) for Endpoints, for MacOS

  CSCwd87112

  1.21.11

  Secure Endpoint, formerly Advanced Malware Protection (AMP) for Endpoints, for Windows

  CSCwd87113

  7.5.91
  8.1.5

  Secure Endpoint Private Cloud

  CSCwe18204

  3.6.0 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.

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

  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

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Workarounds

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• There are no workarounds that address this vulnerability.

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Fixed Software

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• 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.

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Exploitation and Public Announcements

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• 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.

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Source

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• Cisco would like to thank Simon Scannell for reporting this vulnerability.

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Cisco Security Vulnerability Policy

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• 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.

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Related to This Advisory

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URL

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Revision History

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• Version

  Description

  Section

  Status

  Date

  1.1

  Changed date of ClamAV disclosure to February 15.

  Summary

  Final

  2023-FEB-15

  1.0

  Initial public release.

  -

  Final

  2023-FEB-15

  Show Less

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Legal Disclaimer

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  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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