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Cisco Bug: CSCus15440 - Cisco RV016 Deterministic TLS Public Key Vulnerability

Last Modified

May 19, 2017

Products (4)

  • Cisco Small Business RV Series Routers
  • Cisco RV082 Dual WAN VPN Router
  • Cisco RV042 Dual WAN VPN Router
  • Cisco RV016 Multi-WAN VPN Router

Known Affected Releases

4.0.0.7 4.0.2.8-tm 4.0.5.0

Description (partial)

Symptoms:
A vulnerability in the HTTPS session key exchange process of the Cisco RV016 Multi-WAN VPN Router could allow an unauthenticated, remote attacker
to to obtain the key pair used in the 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.

Conditions:
Device running a default configuration with an affected version of software.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
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