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USN-4212-1: HAProxy vulnerability

4 December 2019

HAProxy could be made to execute arbitrary code if it received a specially crafted HTTP/2 header.

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Releases

Packages

  • haproxy - fast and reliable load balancing reverse proxy

Details

Tim Düsterhus discovered that HAProxy incorrectly handled certain HTTP/2 headers.
An attacker could possibly use this issue to execute arbitrary code through CRLF injection.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 19.10
Ubuntu 19.04
Ubuntu 18.04

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

References

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Further reading