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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.3024
                    USN-5063-1: HAProxy vulnerabilities
                             9 September 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           HAProxy
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Confidential Data -- Remote with User Interaction
                   Reduced Security         -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-40346  

Reference:         ESB-2021.3021
                   ESB-2021.3002

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-5063-1

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USN-5063-1: HAProxy vulnerabilities
08 September 2021

HAProxy could be made to expose sensitive information over the network.
Releases

  o Ubuntu 21.04
  o Ubuntu 20.04 LTS

Packages

  o haproxy - fast and reliable load balancing reverse proxy

Details

Ori Hollander discovered that HAProxy incorrectly handled HTTP header name
length encoding. A remote attacker could possibly use this issue to inject
a duplicate content-length header and perform request smuggling attacks.

Update instructions

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

Ubuntu 21.04

  o haproxy - 2.2.9-1ubuntu0.2

Ubuntu 20.04

  o haproxy - 2.0.13-2ubuntu0.3

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

References

  o CVE-2021-40346

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