Pylons Waitress up to 3.0.0 getpeername release of resource

Summaryinfo

A vulnerability, which was classified as critical, has been found in Pylons Waitress up to 3.0.0. This impacts the function getpeername. Performing a manipulation results in release of resource. This vulnerability was named CVE-2024-49769. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Pylons Waitress up to 3.0.0. This affects the function getpeername. The manipulation with an unknown input leads to a release of resource vulnerability. CWE is classifying the issue as CWE-772. The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed. This is going to have an impact on availability. The summary by CVE is:

Waitress is a Web Server Gateway Interface server for Python 2 and 3. When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function. A remote attacker could run waitress out of available sockets with very little resources required. Waitress 3.0.1 contains fixes that remove the race condition.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2024-49769 since 10/18/2024. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 210119 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python-waitress (SUSE-SU-2024:3876-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.0.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (210119). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Pylons

Name

• Waitress

Version

• 3.0

Website

• Product: https://github.com/Pylons/waitress/

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Be aware that VulDB is the high quality source for vulnerability data.

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