CVE-2022-38150 Denial of service in n/a

Medium 6.5 Published Updated

An attacker can cause a denial of service in Varnish Cache by sending forged HTTP/1 backend responses with crafted reason phrases, triggering an assertion failure and restart.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2022-38150?

CVE-2022-38150 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 11 Aug 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In Varnish Cache 7.0.0, 7.0.1, 7.0.2, and 7.1.0, it is possible to cause the Varnish Server to assert and automatically restart through forged HTTP/1 backend responses. An attack uses a crafted reason phrase of the backend response status line. This is fixed in 7.0.3 and 7.1.1.

Weakness: CWE-400

Which versions are affected by CVE-2022-38150?

1 open source package ship an affected version, including varnish. It affects 2 products.

PackageAffectedFixed in
varnish BitnamiFrom 7.0.07.0.1, 7.0.2, 7.0.3, 7.1.1
Linux distribution packages (3)
varnish SUSE:Package Hub 15 SP4All versions7.1.1-bp154.2.6.1
varnish openSUSE:Leap 15.4All versions7.1.1-bp154.2.6.1
varnish openSUSE:TumbleweedAll versions7.1.1-1.1

Products include Fedoraproject Fedora, Varnish Cache Project Varnish Cache.

How do I fix CVE-2022-38150?

Upgrade varnish to a fixed version for your release line: 7.0.1, 7.0.2, 7.0.3 or 7.1.1.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-38150 being exploited?

There is no known exploitation of CVE-2022-38150 in the wild and no public exploit code.

All Fedoraproject Fedora vulnerabilities

Sources

Also known as ALPINE-CVE-2022-38150, BIT-varnish-2022-38150, DEBIAN-CVE-2022-38150, GHSA-jg6x-rh3w-6pp3, OESA-2022-1854, openSUSE-SU-2022:10104-1 and 1 more.

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