1. Ubuntu Security Notices
  2. USN-5474-1

USN-5474-1: Varnish Cache vulnerabilities

Publication date

8 June 2022

Overview

Several security issues were fixed in Varnish Cache.

Releases

Packages

  • varnish - state of the art, high-performance web accelerator

Details

It was dicovered that Varnish Cache did not clear a pointer between the
handling of one client request and the next request within the same connection.
A remote attacker could possibly use this issue to obtain sensitive
information. (CVE-2019-20637)

It was discovered that Varnish Cache could have an assertion failure when a
TLS termination proxy uses PROXY version 2. A remote attacker could possibly
use this issue to restart the daemon and cause a performance loss.
(CVE-2020-11653)

It was discovered that Varnish Cache allowed request smuggling and VCL
authorization bypass via a large Content-Length header for a POST
request. A remote attacker could possibly use this issue to obtain sensitive
information. (CVE-2021-36740)

It was discovered that Varnish Cache allowed request smuggling for...

It was dicovered that Varnish Cache did not clear a pointer between the
handling of one client request and the next request within the same connection.
A remote attacker could possibly use this issue to obtain sensitive
information. (CVE-2019-20637)

It was discovered that Varnish Cache could have an assertion failure when a
TLS termination proxy uses PROXY version 2. A remote attacker could possibly
use this issue to restart the daemon and cause a performance loss.
(CVE-2020-11653)

It was discovered that Varnish Cache allowed request smuggling and VCL
authorization bypass via a large Content-Length header for a POST
request. A remote attacker could possibly use this issue to obtain sensitive
information. (CVE-2021-36740)

It was discovered that Varnish Cache allowed request smuggling for HTTP/1
connections. A remote attacker could possibly use this issue to obtain
sensitive information. (CVE-2022-23959)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
22.04 jammy varnish –  6.6.1-1ubuntu0.2
libvarnishapi2 –  6.6.1-1ubuntu0.2
21.10 impish varnish –  6.5.2-1ubuntu0.2
libvarnishapi2 –  6.5.2-1ubuntu0.2
20.04 focal varnish –  6.2.1-2ubuntu0.1
libvarnishapi2 –  6.2.1-2ubuntu0.1
18.04 bionic varnish –  5.2.1-1ubuntu0.1
libvarnishapi1 –  5.2.1-1ubuntu0.1

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References

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