Buffer overflow in Linux Kernel
CVE-2020-36406
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
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Linux Kernel
- Uwebsockets Project — versions 18.11.0, 18.12.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/google/oss-fuzz-vulns/blob/main/vulns/uwebsockets/OSV-2020-1695.yaml (Third Party Advisory)
- bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Patch, Third Party Advisory, Issue Tracking)
- github.com/uNetworking/uWebSockets/commit/03fca626a95130ab80f86adada54b29d27242… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-36406?
- CVE-2020-36406 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-07-01.
- How severe is CVE-2020-36406?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-36406 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.