CVE-2021-22959

Public Exploit

Description

The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.22%
Vendor Advisory debian.org
Affected: NodeJS Node
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/1238709 third party advisory issue tracking exploit
https://www.oracle.com/security-alerts/cpujan2022.html third party advisory patch
https://www.debian.org/security/2022/dsa-5170 vendor advisory mailing list third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-22959?
CVE-2021-22959 has been scored as a medium severity vulnerability.
How to fix CVE-2021-22959?
To fix CVE-2021-22959, 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-2021-22959 being actively exploited in the wild?
It is possible that CVE-2021-22959 is being exploited or will be exploited in a near future based on public information. 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-2021-22959?
CVE-2021-22959 affects NodeJS Node.
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