CVE-2020-36406

Public Exploit

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

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.59%
Third-Party Advisory chromium.org Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/uwebsockets/OSV-2020-1695.yaml third party advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25381 patch exploit third party advisory issue tracking
https://github.com/uNetworking/uWebSockets/commit/03fca626a95130ab80f86adada54b29d27242759 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-36406?
CVE-2020-36406 has been scored as a high severity vulnerability.
How to fix CVE-2020-36406?
To fix CVE-2020-36406, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-36406 being actively exploited in the wild?
It is possible that CVE-2020-36406 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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