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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.3113 Cisco Small Business RV Series and SA500 Series Dual WAN VPN Router Generated Key Pair Information Disclosure Vulnerability 14 December 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Small Business RV Series Routers Cisco SA500 Series Security Appliances Publisher: Cisco Systems Operating System: Cisco Impact/Access: Access Privileged Data -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2015-6418 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151210-dwvr - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Small Business RV Series and SA500 Series Dual WAN VPN Router Generated Key Pair Information Disclosure Vulnerability Medium Advisory ID: cisco-sa-20151210-dwvr Published: 2015 December 10 22:54 GMT Version 1.0: Final CVSS Score: Base - 4.3 Workarounds: No workarounds available Cisco Bug IDs: CSCus15224 CSCus15238 CSCus15436 CSCus15440 CSCus15446 CSCus15451 CSCus15463 CVE-2015-6418 CWE-200 Summary A vulnerability in the HTTPS session key exchange process of certain Cisco Small Business RV Series Routers and Cisco SA500 Series Security Appliances could allow an unauthenticated, remote attacker to obtain the key pair used in the Transport Layer Security (TLS) session from the affected device. The vulnerability is due to insufficient sources of entropy used by the random number generator. An attacker could exploit this vulnerability by gathering large amounts of TLS handshake data to predict the random numbers generated for the key pair. An exploit could allow the attacker to decrypt session data between a host and the affected device. Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151210-dwvr Affected Products Vulnerable Products The vulnerability affects the following Cisco Small Business RV Series Routers and Cisco SA500 Series Security Appliances: Cisco RV042 Dual WAN VPN Router firmware version 4.0.2.8 Cisco RV042G Dual Gigabit WAN VPN Router firmware versions 4.2.2.7, 4.2.2.8, and 4.2.1.2 Cisco RV082 Dual WAN VPN Router firmware versions 4.0.0.7 and 4.0.2.8 Cisco RV016 Multi-WAN VPN Router firmware versions 4.0.0.7, 4.0.2.8, and 4.0.5.0 Cisco SA520 Security Appliance version 2.2.07 Cisco SA520W Security Appliance version 2.2.07 Cisco SA540 Security Appliance version 2.2.07 Workarounds Workarounds are not available. 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 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 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. URL http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151210-dwvr Revision History Version Description Section Status Date 1.0 Initial public release Final 2015-December-10 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 iQIVAwUBVm5d7H6ZAP0PgtI9AQISGw/6AzoYVD+dx5fv16a7/MF/NturRdzhZrDW Lf7hy0k14Zl61r3T8cCdZvJ1vuaxKApGF7aos6DcbDSH5i4y0+Y3Trei2mfRM6Y4 egYFPepocOC+tbQW1nKyUSDUOQihpZhXeaVneAmkMjzk1zlzjzV72JbJpjQY1BmN j8AdepYpA/ud6baH2+TkBb6wzOta+Db2iXlp2UtGomqCURkI1zTpFNKjF+1ZcdeL C044Zy+YZ1OsByGPhsJ7Z6bg9Ae6tT6gECjIRM/NvuG92VhXi9dPKR9ZSbuCPBbd xtQOR1ICSg97YGx9DizQ/d9/ZDw57ElddThvCNk3ybi0OxreiKcCC0UhlN1WQ7Nu TljiYuQDItsLNnuKrgHPWlKQPu1xlN54qQgHT6IU1i+4QZtMSpsmtwhisKfGYrk2 Vc4aY+9L5R1lqx12gSJyfi2f9+LJHtSRzT8Npq1Nz3xh30xTxBKiByqd2vCzpM0R Amu70Lknl7iATsiB/LlongCFaaM6+Ou5Cx+hiKtdtrcp3muBcx1Iy/37ytkn5Ds1 9cBCjFWhCquK2HifPIKDvniH8IeJL7pMXa1/FsDQVUo438gBCTwn+hgV1i+4+OZj 93WL5HqY6lCaEANvwFcJ/mBXnzikoY0Dn9Y3VNao2la7Q3zIbJwK4D9lTEOVRStN 4KURkiDgwq4= =bdVZ -----END PGP SIGNATURE-----