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Debian Security Advisory DSA-5088-1                   security@debian.org
https://www.debian.org/security/                           Florian Weimer
March 03, 2022                        https://www.debian.org/security/faq
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Package        : varnish
CVE ID         : CVE-2021-36740 CVE-2022-23959
Debian Bug     : 991040 1004433

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/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/

Mailing list: debian-security-announce@lists.debian.org