Vulnerability · Published Nov 1, 2021 · Assigned by apache

CVE-2021-41973Apache MINA HTTP listener DOS

Medium 6.5

In plain English

A medium-severity infinite loop in Apache MINA from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.6% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.5Medium

Exploit odds (30 days)4.6%top 8.2% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	mina2	2.1.5-1	DEBIAN-CVE-2021-41973
Debian:13	mina2	2.1.5-1	DEBIAN-CVE-2021-41973
Debian:14	mina2	2.1.5-1	DEBIAN-CVE-2021-41973
Maven	org.apache.mina:mina-core	2.0.22	GHSA-6mcm-j9cj-3vc3
Maven	org.apache.mina:mina-core	2.1.5	GHSA-6mcm-j9cj-3vc3
Ubuntu:22.04:LTS	mina	no fix listed	UBUNTU-CVE-2021-41973
Ubuntu:24.04:LTS	mina	no fix listed	UBUNTU-CVE-2021-41973

Affected products (as reported)

Vendor	Product	Versions
Apache Software Foundation	Apache MINA	Apache MINA – before 2.1.5

Weakness: CWE-835

References

https://lists.apache.org/thread.html/r0b907da9340d5ff4e6c1a4798ef4e79700a668657f27cca8a39e9250%40%3Cdev.mina.apache.org%3E x_refsource_MISC
[oss-security] 20211101 [ANNOUNCE] Apache MINA 2.0.22 & 2.1.5 released mailing-list, x_refsource_MLIST
[oss-security] 20211101 CVE-2021-41973: Apache MINA HTTP listener DOS mailing-list, x_refsource_MLIST
https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC