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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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