Cisco Security Advisory
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AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:OF/RC:C
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A vulnerability in the Clam AntiVirus (ClamAV) software that is used by Cisco Advance Malware Protection (AMP) for Cisco Email Security Appliances (ESAs) and Cisco Web Security Appliances (WSAs) could allow an unauthenticated, remote attacker to cause the AMP process to restart.
The vulnerability is due to improper parsing of input files by the libclamav library. An attacker could exploit this vulnerability by sending a crafted document that triggers a scan from the AMP ClamAV library on an affected system. A successful exploit could allow the attacker to cause the AMP process to restart.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160531-wsa-esa
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Vulnerable Products
This vulnerability affects the following Cisco products if they are running an affected software release:
- Clam AntiVirus (ClamAV)
- Email Security Appliance (ESA)
- Web Security Appliance (WSA)
Products Confirmed Not Vulnerable
This vulnerability does not affect the following Cisco products:
- Advanced Malware Protection for Networks, 7000 and 8000 Series Appliances
- AnyConnect Secure Mobility Client
- ASA 5500-X Series with FirePOWER Services
- Cloud Web Security
- Content Security Management Appliance (SMA)
- FireAMP
- Firepower 4100 Series
- FirePOWER 7000 Series Appliances
- FirePOWER 8000 Series Appliances
- Firepower 9300 Series
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There are no workarounds that address this vulnerability.
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When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to upgrade 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.
This vulnerability is addressed in the following Cisco AsyncOS Software releases:
- 9.7.0-125 and later for Cisco ESA
- 9.0.1-135 and later for Cisco WSA
- 9.1.1-041 and later for Cisco WSA
This vulnerability is also addressed in ClamAV releases 0.99 and later.
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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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This vulnerability was found during the resolution of support cases.
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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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Show LessVersion Description Section Status Date 1.0 Initial public release. — Final 2016-May-31
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