CVE-2023-23759 Denial of service in fizz
A remote attacker can crash the application using the Fizz TLS library by manipulating cipher advertisements during the TLS handshake.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-23759?
CVE-2023-23759 is a high-severity denial of service vulnerability in Facebook fizz, published on 18 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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).
Weakness: CWE-617
Which versions are affected by CVE-2023-23759?
It affects 1 product.
Products include Facebook Fizz.
How do I fix CVE-2023-23759?
No fix has been published for CVE-2023-23759 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-23759 being exploited?
There is no known exploitation of CVE-2023-23759 in the wild and no public exploit code.
Other vulnerabilities in Facebook fizz
Sources
Also known as GHSA-2x3r-3grm-f4ww.