-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
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
CVE Names: CVE-2015-6418
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Small Business RV Series and SA500 Series Dual WAN VPN Router Generated
Key Pair Information Disclosure Vulnerability
2015 December 10 22:54 GMT
Base - 4.3
No workarounds available
Cisco Bug IDs:
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:
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 188.8.131.52
Cisco RV042G Dual Gigabit WAN VPN Router firmware versions 184.108.40.206, 220.127.116.11,
Cisco RV082 Dual WAN VPN Router firmware versions 18.104.22.168 and 22.214.171.124
Cisco RV016 Multi-WAN VPN Router firmware versions 126.96.36.199, 188.8.131.52, and
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 are not available.
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
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.
Version Description Section Status Date
1.0 Initial public release Final 2015-December-10
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 firstname.lastname@example.org
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:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: email@example.com
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-----
-----END PGP SIGNATURE-----