CVE-2009-2631: Clientless SSL VPN products break web browser domain-based security models

Vulnerability summary

CVE-2009-2631 is a medium (CVSS 6.8) Improper Access Control vulnerability in cisco adaptive security appliance web ssl vpn. EPSS estimates a 4.82% chance of exploitation in the next 30 days, higher than 91.9% of scored vulnerabilities.

Timeline

1. 04-12-2009
   PublishedVulnerability first disclosed.
2. 16-06-2025
   Last modifiedVulnerability information updated.

Description

Multiple clientless SSL VPN products that run in web browsers, including Stonesoft StoneGate; Cisco ASA; SonicWALL E-Class SSL VPN and SonicWALL SSL VPN; SafeNet SecureWire Access Gateway; Juniper Networks Secure Access; Nortel CallPilot; Citrix Access Gateway; and other products, when running in configurations that do not restrict access to the same domain as the VPN, retrieve the content of remote URLs from one domain and rewrite them so they originate from the VPN's domain, which violates the same origin policy and allows remote attackers to conduct cross-site scripting attacks, read cookies that originated from other domains, access the Web VPN session to gain access to internal resources, perform key logging, and conduct other attacks. NOTE: it could be argued that this is a fundamental design problem in any clientless VPN solution, as opposed to a commonly-introduced error that can be fixed in separate implementations. Therefore a single CVE has been assigned for all products that have this design

• CWE-284Improper Access ControlThe product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
• CWE-264Permissions, Privileges, and Access ControlsWeaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.