CVE-2020-36406 Memory corruption in n/a
A stack-based buffer overflow in uWebSockets allows attackers to cause denial of service or execute arbitrary code via excessive topic subscriptions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-36406?
CVE-2020-36406 is a high-severity memory corruption vulnerability in n/a, published on 1 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
uWebSockets 18.11.0 and 18.12.0 has a stack-based buffer overflow in uWS::TopicTree::trimTree (called from uWS::TopicTree::unsubscribeAll). NOTE: the vendor's position is that this is "a minor issue or not even an issue at all" because the developer of an application (that uses uWebSockets) should not be allowing the large number of triggered topics to accumulate
Weakness: CWE-787
Which versions are affected by CVE-2020-36406?
It affects 1 product.
Products include Uwebsockets Project Uwebsockets.
How do I fix CVE-2020-36406?
No fix has been published for CVE-2020-36406 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-36406 being exploited?
There is no known exploitation of CVE-2020-36406 in the wild and no public exploit code.
Sources
Also known as GHSA-8hff-gxvr-v39f.