CVE-2021-3690

Public Exploit

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.

Categories

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.52%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: n/a undertow
Published at:
Updated at:

References

Link Tags
https://issues.redhat.com/browse/UNDERTOW-1935 issue tracking mitigation vendor advisory exploit
https://bugzilla.redhat.com/show_bug.cgi?id=1991299 issue tracking vendor advisory
https://access.redhat.com/security/cve/CVE-2021-3690 vendor advisory
https://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-3690?
CVE-2021-3690 has been scored as a high severity vulnerability.
How to fix CVE-2021-3690?
To fix CVE-2021-3690, 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-2021-3690 being actively exploited in the wild?
It is possible that CVE-2021-3690 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.
What software or system is affected by CVE-2021-3690?
CVE-2021-3690 affects n/a undertow.
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