Fedora 37 Varnish Modules Critical Advisory: Request Smuggling & Forgery

This is a collection of modules ("vmods") extending Varnish VCL used

for describing HTTP request/response policies with additional

capabilities. This collection contains the following vmods:

bodyaccess, header, saintmode, tcp, var, vsthrottle, xkey

New upstream release: A security release. This release includes fix for

CVE-2022-45059 (VSV00011) and CVE-2022-45060 (VSV00010). From the upstream

release notes: VSV00010 Varnish Request Smuggling Vulnerability Date:

2022-11-08 A request smuggling attack can be performed on Varnish Cache servers

by requesting that certain headers are made hop-by-hop, preventing the Varnish

Cache servers from forwarding critical headers to the backend. Among the headers

that can be filtered this way are both Content-Length and Host, making it

possible for an attacker to both break the HTTP/1 protocol framing, and bypass

request to host routing in VCL. VSV00011 Varnish HTTP/2 Request Forgery

Vulnerability Date: 2022-11-08 A request forgery attack can be performed on

Varnish Cache servers that have the HTTP/2 protocol turned on. An attacker may

introduce characters through the 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 may in turn be used to successfully exploit

vulnerabilities in a server behind the Varnish server.

* Mon Nov 14 2022 Ingvar Hagelund - 0.20.0-4

- Built for varnish-7.1.2

[ 1 ] Bug #2141842 - CVE-2022-45059 varnish: Request Smuggling Vulnerability [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=2141842

[ 2 ] Bug #2141847 - CVE-2022-45060 varnish: Request Forgery Vulnerability [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=2141847

su -c 'dnf upgrade --advisory FEDORA-2022-0d5dcc031e' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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