Initial Publication Date: Advisory Status: Advisory Severity: CVSS Base Score:Legacy ID
23 Jan 2015 Closed High CVSS v2: 9.3 SA89
A flaw in the validation of the certificate presented by the ProxySG to the ProxyClient and Unified Agent can allow an attacker to pose as the legitimate ProxySG to deliver malicious executables and policy to clients.
The following products are vulnerable:
All versions of ProxyClient prior to 188.8.131.52 and 184.108.40.206 are vulnerable.
All versions of Unified Agent prior to 220.127.116.11952 are vulnerable when connecting to the Client Manager on ProxySG. Unified Agent connecting to ThreatPulse is not vulnerable.
ProxyClient 3.4 - a fix is available in 18.104.22.168.
ProxyClient 3.3 - a fix is available in 22.214.171.124.
ProxyClient 3.2 and prior - a fix will not be provided. Please upgrade to the latest ProxyClient release with the vulnerability fix.
Unified Agent 4.1 - a fix is available in 126.96.36.199952.
ProxyClient and Unified Agent connect to a Client Manager that resides on the ProxySG. The connection to the Client Manager is used to download new configuration and software updates to the client. The connection is secured using TLS/SSL and can be established over a corporate network or over a public network.
A flaw in the validation of the of the Client Manager certificate performed by the ProxyClient and the Unified agent could allow an attacker to pose as the Client Manager. An attacker could use this vulnerability to modify the configuration parameters of ProxyClient and Unified Agent, to deliver malicious web content to ProxyClient and Unified Agent, and to deliver malicious software updates to ProxyClient. An attacker potentially could use this flaw to gain full administrative acces to the client.
The Unified Agent is vulnerable only when connecting to the Client Manager on ProxySG. Unified Agent is not vulnerable when connecting to ThreatPulse. Connections from the Unified Agent to ThreatPulse are over a VPN, not over TLS/SSL.
This vulnerability was reported by Damien Cabrié. Thank you!
2015-02-13 Added URL for CVE number in References; marked as final
2015-02-09 Corrected CVE number
2015-02-02 CVE number assigned
2015-01-24 Clarified that Unified Agent is not vulnerable when connecting to ThreatPulse; Unified Agent is vulnerable only when connecting to the Client Manager on ProxySG.
2015-01-23 Initial public release
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