A vulnerability, which was classified as problematic, has been found in Facebook fizz (Social Network Software). This issue affects some unknown functionality of the component ClientHello Handler. The manipulation with an unknown input leads to a assertion vulnerability. Using CWE to declare the problem leads to CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Impacted is availability. The summary by CVE is:

There is a vulnerability in the fizz library prior to v2023.01.30.00 where a CHECK failure can be triggered remotely. This behavior requires the client supported cipher advertisement changing between the original ClientHello and the second ClientHello, crashing the process (impact is limited to denial of service).

The weakness was published 05/19/2023. The advisory is shared at facebook.com. The identification of this vulnerability is CVE-2023-23759 since 01/17/2023. Neither technical details nor an exploit are publicly available.

Upgrading to version 2023.01.30.00 eliminates this vulnerability. Applying the patch 8d3649841597bedfb6986c30431ebad0eb215265 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Similar entry is available at VDB-259080.

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Type

• Social Network Software

Vendor

• Facebook

Name

• fizz

License

• free

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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