CVE-2020-25097

A flaw was found in squid. Due to improper validation while parsing the request URI, squid is vulnerable to HTTP request smuggling. This issue could allow a trusted client to perform an HTTP request smuggling attack and access services otherwise forbidden by squid. The highest threat from this vulnerability is to data confidentiality.

This flaw is not tied to a specific proxy type (e.g., forward or reverse) and has been rated as having a security impact of Important. This flaw affects the versions of Squid as shipped with Red Hat Enterprise Linux 7 and 8, and is not currently planned to be addressed in future updates of Red Hat Enterprise Linux 6. Red Hat Enterprise Linux 6 is now in Extended Life Phase of the support and maintenance life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

This flaw can be mitigated by setting the uri_whitespace directive in squid.conf to either:

uri_whitespace deny

or

uri_whitespace encode