CVE-2021-3690
Undertow vulnerable to memory exhaustion due to buffer leak
7.5
HIGH
CVSS 3.1
EPSS 0.36%
Description
A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.
How to fix CVE-2021-3690
To remediate CVE-2021-3690, upgrade the affected package to a fixed version below.
- —upgrade to 2.2.10-1 or later
- —upgrade to 2.0.40 or later
Is CVE-2021-3690 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.2.10-1
- from 0, < 2.0.40
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |