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Ubuntu Security Notice USN-7115-1
November 19, 2024

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

- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in Waitress.

Software Description:
- waitress: production-quality pure-Python WSGI server

Details:

It was discovered that Waitress could process follow up requests when
receiving a specially crafted message. An attacker could use this issue to
have the server process inconsistent client requests. (CVE-2024-49768)

Dylan Jay discovered that Waitress could be lead to write to an unexisting
socket after closing the remote connection. An attacker could use this
issue to increase resource utilization leading to a denial of service.
(CVE-2024-49769)

Update instructions:

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

Ubuntu 24.10
   python3-waitress                3.0.0-1ubuntu0.1

Ubuntu 24.04 LTS
   python3-waitress                2.1.2-2ubuntu0.1~esm1
                                   Available with Ubuntu Pro

Ubuntu 22.04 LTS
   python3-waitress                1.4.4-1.1ubuntu1.1

Ubuntu 20.04 LTS
   python3-waitress                1.4.1-1ubuntu0.2

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-7115-1
   CVE-2024-49768, CVE-2024-49769

Package Information:
   https://launchpad.net/ubuntu/+source/waitress/3.0.0-1ubuntu0.1
   https://launchpad.net/ubuntu/+source/waitress/1.4.4-1.1ubuntu1.1
   https://launchpad.net/ubuntu/+source/waitress/1.4.1-1ubuntu0.2