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Ubuntu Security Notice USN-6837-2
August 19, 2024

ruby-rack vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Rack.

Software Description:
- ruby-rack: modular Ruby webserver interface

Details:

It was discovered that Rack incorrectly parsed certain media types. A
remote attacker could possibly use this issue to cause Rack to consume
resources, leading to a denial of service. This issue only affected
Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-25126)

It was discovered that Rack incorrectly handled certain Range headers. A
remote attacker could possibly use this issue to cause Rack to create
large responses, leading to a denial of service. (CVE-2024-26141)

It was discovered that Rack incorrectly handled certain crafted headers. A
remote attacker could possibly use this issue to cause Rack to consume
resources, leading to a denial of service. (CVE-2024-26146)

Update instructions:

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

Ubuntu 22.04 LTS
   ruby-rack                       2.1.4-5ubuntu1+	5
                                   Available with Ubuntu Pro

Ubuntu 20.04 LTS
   ruby-rack                       2.0.7-2ubuntu0.1+esm5
                                   Available with Ubuntu Pro

Ubuntu 18.04 LTS
   ruby-rack                       1.6.4-4ubuntu0.2+esm6
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   ruby-rack                       1.6.4-3ubuntu0.2+esm6
                                   Available with Ubuntu Pro

Ubuntu 14.04 LTS
   ruby-rack                       1.5.2-3+deb8u3ubuntu1~esm8
                                   Available with Ubuntu Pro

After a standard system update you need to restart any applications using
Rack to make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-6837-2
   https://ubuntu.com/security/notices/USN-6837-1
   CVE-2024-25126, CVE-2024-26141, CVE-2024-26146