USN-7503-1: h11 vulnerability

Publication date

8 May 2025

Overview

python-h11 could be made to expose sensitive information over the network.


Packages

  • python-h11 - Pure-Python, bring-your-own-I/O implementation of HTTP/1.1

Details

Jeppe Bonde Weikop discovered that h11 incorrectly handled crafted HTTP
requests. A remote attacker could possibly use this issue to smuggle
malicious HTTP requests, which could potentially lead to security
control bypass and information leakage.

Jeppe Bonde Weikop discovered that h11 incorrectly handled crafted HTTP
requests. A remote attacker could possibly use this issue to smuggle
malicious HTTP requests, which could potentially lead to security
control bypass and information leakage.

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
25.04 plucky python3-h11 –  0.14.0-1ubuntu0.25.04.1
24.10 oracular python3-h11 –  0.14.0-1ubuntu0.24.10.1
24.04 noble python3-h11 –  0.14.0-1ubuntu0.24.04.1

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.


Have additional questions?

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