CVE-2021-41973

Apache MINA HTTP listener DOS

Description

In Apache MINA, a specifically crafted, malformed HTTP request may cause the HTTP Header decoder to loop indefinitely. The decoder assumed that the HTTP Header begins at the beginning of the buffer and loops if there is more data than expected. Please update MINA to 2.1.5 or greater.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.60% Top 20%
Vendor Advisory apache.org
Affected: Apache Software Foundation Apache MINA
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread.html/r0b907da9340d5ff4e6c1a4798ef4e79700a668657f27cca8a39e9250%40%3Cdev.mina.apache.org%3E patch vendor advisory mailing list
http://www.openwall.com/lists/oss-security/2021/11/01/2 patch mailing list third party advisory
http://www.openwall.com/lists/oss-security/2021/11/01/8 third party advisory mailing list
https://www.oracle.com/security-alerts/cpuapr2022.html third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-41973?
CVE-2021-41973 has been scored as a medium severity vulnerability.
How to fix CVE-2021-41973?
To fix CVE-2021-41973, 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-2021-41973 being actively exploited in the wild?
It is possible that CVE-2021-41973 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41973?
CVE-2021-41973 affects Apache Software Foundation Apache MINA.
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