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Ubuntu Security Notice USN-4212-1
December 04, 2019

haproxy vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.10
- Ubuntu 19.04
- Ubuntu 18.04 LTS

Summary:

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

Software Description:
- 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.

Update instructions:

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

Ubuntu 19.10:
  haproxy                         2.0.5-1ubuntu0.3

Ubuntu 19.04:
  haproxy                         1.8.19-1ubuntu1.3

Ubuntu 18.04 LTS:
  haproxy                         1.8.8-1ubuntu0.9

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

References:
  https://usn.ubuntu.com/4212-1
  CVE-2019-19330

Package Information:
  https://launchpad.net/ubuntu/+source/haproxy/2.0.5-1ubuntu0.3
  https://launchpad.net/ubuntu/+source/haproxy/1.8.19-1ubuntu1.3
  https://launchpad.net/ubuntu/+source/haproxy/1.8.8-1ubuntu0.9