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Ubuntu 25.04 WEBrick Severe HTTP Request Smuggling USN-7709-1 CVE-2025-6442

ubuntu
Calendar Grey August 21, 2025
Dist Ubuntu Esm H88
The HTTP server WEBrick on Ubuntu has critical vulnerabilities that allow for HTTP request smuggling; updates are now available for impacted releases.
WEBrick could allow an HTTP request smuggling attack.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.04 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: WEBrick could allow an HTTP request smuggling attack. Software Description: - ruby-webrick: HTTP server toolkit in Ruby Details: It was discovered that WEBrick incorrectly parsed HTTP headers. In configurations where WEBrick is placed behind an HTTP proxy, a remote attacker could possibly use this issue to perform an HTTP Request Smuggling attack.

Topics%20covered

Topics Covered

security advisory critical remote attack Ubuntu HTTP ruby-webrick

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 25.04 ruby-webrick 1.8.1-1ubuntu1.1 Ubuntu 24.04 LTS ruby-webrick 1.8.1-1ubuntu0.2 Ubuntu 22.04 LTS ruby-webrick 1.7.0-3ubuntu0.2 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7709-1

CVE-2025-6442

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7709-1

Topics%20covered

Topics Covered

security advisory critical remote attack Ubuntu HTTP ruby-webrick

Package Information

https://launchpad.net/ubuntu/+source/ruby-webrick/1.8.1-1ubuntu1.1 https://launchpad.net/ubuntu/+source/ruby-webrick/1.8.1-1ubuntu0.2

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