NULL Pointer Dereference Vulnerability in Squid HTTP Caching Proxy Allows Denial of Service

CVE-2018-1000027 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later.

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