An HTTP Request Forgery issue was discovered in Varnish Cache 5.x and 6.x before 6.0.11, 7.x before 7.1.2, and 7.2.x before 7.2.1. An attacker may introduce characters through HTTP/2 pseudo-headers that are invalid in the context of an HTTP/1 request line, causing the Varnish server to produce invalid HTTP/1 requests to the backend. This could, in turn, be used to exploit vulnerabilities in a server behind the Varnish server. Note: the 6.0.x LTS series (before 6.0.11) is affected.

References[email protected]/message/XGF6LFTHXCSYMYUX5HLMVXQH3WHCSFLU/[email protected]/message/G6ZMOZVBLZXHEV5VRW4I4SOWLQEK5OF5/[email protected]/message/M4KVVCIQVINQQ2D7ORNARSYALMJUMP3I/


Source: MITRE

Published: 2022-11-09

Updated: 2023-02-28