Debian 11 Bullseye DSA-5088-1 Critical: Varnish Request Smuggling

Brief introduction

CVE-2021-36740

Martin Blix Grydeland discovered that Varnish is vulnerable to
request smuggling attacks if the HTTP/2 protocol is enabled.

CVE-2022-23959

James Kettle discovered a request smuggling attack against the
HTTP/1 protocol implementation in Varnish.

For the oldstable distribution (buster), these problems have been fixed
in version 6.1.1-1+deb10u3.

For the stable distribution (bullseye), these problems have been fixed in
version 6.5.1-1+deb11u2.

We recommend that you upgrade your varnish packages.

For the detailed security status of varnish please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/varnish

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/