Title: Alteon AceDirector Half-Closed HTTP Request IP Address Revealing Vulnerabililty
Severity: HIGH
Description:
Alteon ACEdirector is a hardware solution distributed by Nortel Networks. ACEdirector runs the Nortel WebOS operating system.
A problem with the handling of some types of network traffic may make it possible for a remote user to gain sensitive information. The problem is in the handling of half-closed HTTP connections.
It is possible to retrieve the real IP addresses of webservers that are managed by an ACEdirector. When a client is connected to a webserver via the virtual IP address of the ACEdirector, the connection to a web server in the load balanced pool is tracked by a cookie and session id. The traffic is then altered to appear as though it is coming from the ACEdirector.
When a client has half-closed a connection to the ACEdirector, the load balancer will no longer alter the traffic to the client to appear as though it is coming from the ACEdirector's IP address. The traffic will continue to come from the webserver, but will instead come from the real IP address of the web server.
This problem makes it possible for a remote user to gather information about webservers, and could lead to organized attack against network resources.
Affected Products:
- Nortel Networks WebOS 9.0.0
References:
- Nortel Networks: Nortel Networks Homepage
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