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CVE-2021-41973 Apache MINA

Affected softwareApache MINA
Severity6.5 Medium CVSS 3.1 2 scores
Fixed in2.1.5, 2.0.22
WeaknessCWE-835
Published1 Nov 2021
Updated17 Jun 2026

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 5 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 4.6% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

CVSS

6.5 MEDIUM v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H NVD Primary published
CVSS 2.0 4.3 none AV:N/AC:M/Au:N/C:N/I:N/A:P NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update April 2025 ↗ CPU 2025-Q2 Oracle Analytics / Platform Security (Apache Mina) (12.2.1.4.0)
Oracle Critical Patch Update April 2023 ↗ CPU 2023-Q2 Oracle JD Edwards / Interoperability SEC (Apache Mina) (Prior to 9.2.7.3)
Oracle Critical Patch Update April 2022 ↗ CPU 2022-Q2 Oracle Support Tools / Diagnostic Assistant (Apache MINA) (2.12.42)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Analytics Platform Security (Apache Mina) 12.2.1.4.0 12.2.1.4.0
Oracle JD Edwards Interoperability SEC (Apache Mina) Prior to 9.2.7.3
Oracle Support Tools Diagnostic Assistant (Apache MINA) 2.12.42 2.12.42

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.mina:mina-core 2.1.0 2.1.5 unbounded
org.apache.mina:mina-core 0 2.0.22 unbounded

Products and versions

10 products, 16 version entries
SourceVendorProductSchemeAffected versions
nvd apache mina generic < 2.0.22 · ≥ 2.1.0 and < 2.1.5
nvd oracle banking payments generic 14.5
nvd oracle banking trade finance process management generic 14.5
nvd oracle banking treasury management generic 14.5
nvd oracle communications cloud native core console generic 1.9.0
nvd oracle customer management and segmentation foundation generic 18.0 · 19.0
nvd oracle flexcube universal banking generic ≥ 14.0 and ≤ 14.3 · 14.5
nvd oracle fusion middleware common libraries and tools generic 12.2.1.3.0 · 12.2.1.4.0 · 14.1.1.0.0
nvd oracle oss support tools generic 2.12.42
osv org.apache.mina mina-core generic < 2.0.22 · ≥ 2.1.0 and < 2.1.5

References

URLTags
https://lists.apache.org/thread.html/r0b907da9340d5ff4e6c1a4798ef4e79700a668657f27cca8a39e9250%40%3Cdev.mina.apache.org%3E WEB
https://www.oracle.com/security-alerts/cpuapr2022.html WEB
http://www.openwall.com/lists/oss-security/2021/11/01/2 WEB
http://www.openwall.com/lists/oss-security/2021/11/01/8 WEB

Timeline

Published2021-11-01By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.