DescriptionAn issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x before 6.2.3, and 6.3.x before 6.3.2. It occurs when communication with a TLS termination proxy uses PROXY version 2. There can be an assertion failure and daemon restart, which causes a performance loss.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
Debian Bugs956307

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
varnish (PTS)buster, buster (security)6.1.1-1+deb10u3vulnerable
bullseye (security), bullseye6.5.1-1+deb11u2fixed
bookworm, sid7.1.0-6fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
varnishsourcejessie(not affected)
varnishsourcestretch(not affected)


[buster] - varnish <postponed> (Can be fixed along in next DSA)
[stretch] - varnish <not-affected> (Only affects 6.x)
[jessie] - varnish <not-affected> (Only affects 6.x)

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