CVE-2019-11924 Denial of service in fizz
An attacker can cause memory exhaustion and denial of service by sending empty handshake fragments to applications using the Fizz TLS library.
- 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-2019-11924?
CVE-2019-11924 is a high-severity denial of service vulnerability in Facebook fizz, published on 20 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A peer could send empty handshake fragments containing only padding which would be kept in memory until a full handshake was received, resulting in memory exhaustion. This issue affects versions v2019.01.28.00 and above of fizz, until v2019.08.05.00.
Weakness: CWE-770
Which versions are affected by CVE-2019-11924?
It affects 1 product.
Products include Facebook Fizz.
How do I fix CVE-2019-11924?
No fix has been published for CVE-2019-11924 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-2019-11924 being exploited?
There is no known exploitation of CVE-2019-11924 in the wild and no public exploit code.
Other vulnerabilities in Facebook fizz
Sources
Also known as GHSA-w38x-26w3-8j5j.