Name of the Vulnerable Software and Affected Versions:
Squid HTTP Caching Proxy versions 3.0 through 3.5.27
Squid HTTP Caching Proxy versions 4.0 through 4.0.22
Description:
The issue is related to Incorrect Pointer Handling in ESI Response Processing, which can cause Denial of Service for all clients using the proxy. This can be exploited when a remote server delivers an HTTP response payload containing valid but unusual ESI syntax.
Recommendations:
For Squid HTTP Caching Proxy versions 3.0 through 3.5.27, update to version 4.0.23 or later.
For Squid HTTP Caching Proxy versions 4.0 through 4.0.22, update to version 4.0.23 or later.