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Ubuntu Security Notice USN-5551-1

Ubuntu Security Notice USN-5551-1
Posted Aug 5, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5551-1 - 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.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2022-2255
SHA-256 | c0d8b0811cff1c4ea3ce6d3631247e214ed04798446bc13c1afab5378aab94e1

Ubuntu Security Notice USN-5551-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5551-1
August 04, 2022

mod-wsgi vulnerability
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

mod-wsgi could allow unintended access to network services.

Software Description:
- 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.

Update instructions:

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

Ubuntu 22.04 LTS:
libapache2-mod-wsgi-py3 4.9.0-1ubuntu0.1

Ubuntu 20.04 LTS:
libapache2-mod-wsgi 4.6.8-1ubuntu3.1
libapache2-mod-wsgi-py3 4.6.8-1ubuntu3.1

Ubuntu 18.04 LTS:
libapache2-mod-wsgi 4.5.17-1ubuntu1.1
libapache2-mod-wsgi-py3 4.5.17-1ubuntu1.1

After a standard system update you need to restart your web service to make
all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5551-1
CVE-2022-2255

Package Information:
https://launchpad.net/ubuntu/+source/mod-wsgi/4.9.0-1ubuntu0.1
https://launchpad.net/ubuntu/+source/mod-wsgi/4.6.8-1ubuntu3.1
https://launchpad.net/ubuntu/+source/mod-wsgi/4.5.17-1ubuntu1.1
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