An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-09-02T16:34:04

Updated: 2024-08-04T13:30:21.842Z

Reserved: 2020-07-17T00:00:00

Link: CVE-2020-15810

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-09-02T17:15:11.627

Modified: 2024-11-21T05:06:13.550

Link: CVE-2020-15810

cve-icon Redhat

Severity : Important

Publid Date: 2020-08-23T00:00:00Z

Links: CVE-2020-15810 - Bugzilla