element-hq synapse up to 1.120.0 allocation of resources

Summaryinfo

A vulnerability was found in element-hq synapse up to 1.120.0 and classified as critical. This issue affects some unknown processing. The manipulation results in allocation of resources. This vulnerability is reported as CVE-2024-52805. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in element-hq synapse up to 1.120.0. Affected is an unknown code. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes:

Synapse is an open-source Matrix homeserver. In Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. Synapse 1.120.1 resolves the issue by denying requests with unsupported multipart/form-data content type.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2024-52805 since 11/15/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 212753 (Fedora 41 : matrix-synapse (2024-4cadba7a29)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.120.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (212753). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• element-hq

Name

• synapse

Version

• 1.120

Website

• Product: https://github.com/element-hq/synapse/

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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