CVE-2021-24029 Denial of service in mvfst
A specially crafted QUIC message causes a crash via failed assertion in mvfst and proxygen libraries, leading to denial of service.
- 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-2021-24029?
CVE-2021-24029 is a high-severity denial of service vulnerability in Facebook mvfst, published on 15 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a crash via a failed assertion. Per QUIC specification, this particular message should be treated as a connection error. This issue affects mvfst versions prior to commit a67083ff4b8dcbb7ee2839da6338032030d712b0 and proxygen versions prior to v2021.03.15.00.
Weakness: CWE-617
Which versions are affected by CVE-2021-24029?
It affects 2 products.
Products include Facebook Mvfst, Facebook Proxygen.
How do I fix CVE-2021-24029?
No fix has been published for CVE-2021-24029 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-2021-24029 being exploited?
There is no known exploitation of CVE-2021-24029 in the wild and no public exploit code.
Sources
Also known as GHSA-hjc6-5p5c-w4wg.