CVE-2021-20220

Description

A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was found. HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own. The highest threat from this vulnerability is to data confidentiality and integrity.

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.31%
Vendor Advisory redhat.com
Affected: n/a undertow
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1923133 vendor advisory issue tracking
https://security.netapp.com/advisory/ntap-20220210-0013/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-20220?
CVE-2021-20220 has been scored as a medium severity vulnerability.
How to fix CVE-2021-20220?
To fix CVE-2021-20220, 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-2021-20220 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-20220 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20220?
CVE-2021-20220 affects n/a undertow.
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