Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.1376 Cisco ESA and WSA AMP ClamAV Denial of Service Vulnerability 1 June 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Email Security Appliance Cisco Web Security Appliance Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-1405 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160531-wsa-esa - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco ESA and WSA AMP ClamAV Denial of Service Vulnerability Medium Advisory ID: cisco-sa-20160531-wsa-esa Published: 2016 May 31 10:30 GMT Version 1.0: Final CVSS Score: Base - 5.0 Workarounds: No workarounds available Cisco Bug IDs: CSCuv78533 CSCuw60503 CVE-2016-1405 CWE-119 Summary 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 Affected Products 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 Content Security Management Appliance (SMA) FireAMP Firepower 4100 Series FirePOWER 7000 Series Appliances FirePOWER 8000 Series Appliances Firepower 9300 Series Workarounds There are no workarounds that address this vulnerability. Fixed Software 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. 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 the resolution of support cases. URL http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160531-wsa-esa Revision History Version Description Section Status Date 1.0 Initial public release. - Final 2016-May-31 Legal Disclaimer 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBV05HuYx+lLeg9Ub1AQiVYhAAnZSwsz+bndSgx/gAawLMAv1ogBHV85W4 AHR6LYYXDitsujE9IeOiUPP8tadO0011+u+0aTbMmA1g5JJILMpFqjQpSFCfn/xd H4ZxFeU8O4dMZkI+ZWIiyO0g6zu5OgmhlaqAozMlL4mvU4HY/iHPSLW70M7uQQMU SkfrSZ2JNDis6gnX3WLI5Hr1g8glKBdqh7agqx8HUQ6gF/agW5CtnichhUpe+09Y HyGXOrVGSRP/XDWn2AtjlCITu6ng26a7N1X89CdxrMl/Tk22ocPTiPwb4xTf4yrL Brgns+zpjXafbikrWHK48kEBpBzmniX81El25QRQVq1s4kde56ngzU+i5Yjjwujx k0OSAW7z3KkY3CLtsTJcWxP8Vjalhu/FHTVTKa3H1cM49mqIpzjRIFpgzFciNZC3 RCQYRbcmvVlXY6q+e0vtt5e13w47ZDqMRJWgwyxLWOtwjxJ/lhQDnsuB/SAv4wXu UG2/4TafJ0D/Mc571cTiRUNH1KXrYmoXdSWJ/Mw1s+fwviPDXDOLn+70SrOX64/R owxYN8LJRDjExisPw8a8IEWgkAFWK6dxcdq78/7Ssq36ZGPVGFAfn1Oq2MCrnp18 0eB+qve6aFgc4O4PZyB8+hw0JWsNG50mrjQz8bsVqv2I2TcQpvRAE9N5q2Rk26bD CdZxWkBYl+4= =HpDS -----END PGP SIGNATURE-----