1. Ubuntu Security Notices
  2. USN-5551-1

USN-5551-1: mod-wsgi vulnerability

Publication date

4 August 2022

Overview

mod-wsgi could allow unintended access to network services.

Releases

Packages

  • mod-wsgi - Python WSGI adapter module for Apache

Details

It was discovered that mod-wsgi did not correctly remove the X-Client-IP
header when processing requests from untrusted proxies. A remote attacker
could use this issue to pass the header to WSGI applications, contrary
to expectations.

It was discovered that mod-wsgi did not correctly remove the X-Client-IP
header when processing requests from untrusted proxies. A remote attacker
could use this issue to pass the header to WSGI applications, contrary
to expectations.

Update instructions

After a standard system update you need to restart your web service to 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
22.04 jammy libapache2-mod-wsgi-py3 –  4.9.0-1ubuntu0.1
20.04 focal libapache2-mod-wsgi –  4.6.8-1ubuntu3.1
libapache2-mod-wsgi-py3 –  4.6.8-1ubuntu3.1
18.04 bionic libapache2-mod-wsgi –  4.5.17-1ubuntu1.1
libapache2-mod-wsgi-py3 –  4.5.17-1ubuntu1.1

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.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›