CVE Vulnerabilities

CVE-2016-6454

Cross-Site Request Forgery (CSRF)

Published: Nov 03, 2016 | Modified: Nov 28, 2016
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

A cross-site request forgery (CSRF) vulnerability in the web interface of the Cisco Hosted Collaboration Mediation Fulfillment application could allow an unauthenticated, remote attacker to execute unwanted actions. More Information: CSCva54241. Known Affected Releases: 11.5(1). Known Fixed Releases: 11.5(0.98000.216).

Weakness

The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

Affected Software

Name Vendor Start Version End Version
Hosted_collaboration_mediation_fulfillment Cisco 10.6(1).0 (including) 10.6(1).0 (including)
Hosted_collaboration_mediation_fulfillment Cisco 10.6(2).0 (including) 10.6(2).0 (including)
Hosted_collaboration_mediation_fulfillment Cisco 10.6(3).0 (including) 10.6(3).0 (including)
Hosted_collaboration_mediation_fulfillment Cisco 11.5(1).0 (including) 11.5(1).0 (including)

Potential Mitigations

  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
  • For example, use anti-CSRF packages such as the OWASP CSRFGuard. [REF-330]
  • Another example is the ESAPI Session Management control, which includes a component for CSRF. [REF-45]
  • Use the “double-submitted cookie” method as described by Felten and Zeller:
  • When a user visits a site, the site should generate a pseudorandom value and set it as a cookie on the user’s machine. The site should require every form submission to include this value as a form value and also as a cookie value. When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same.
  • Because of the same-origin policy, an attacker cannot read or modify the value stored in the cookie. To successfully submit a form on behalf of the user, the attacker would have to correctly guess the pseudorandom value. If the pseudorandom value is cryptographically strong, this will be prohibitively difficult.
  • This technique requires Javascript, so it may not work for browsers that have Javascript disabled. [REF-331]

References