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MinaApplication · Apache

CVE-2021-41973

MEDIUM · 6.5 CVSS v3.1 Published 2021-11-01
Fix available
A fix is available. Upgrade to 2.0.22 / 2.1.5 or later.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-835

Crafted input drives a loop whose exit condition is never satisfied, hanging the thread and starving the service of the resource it occupies. A single request can be enough to take a worker down. Remediation is bounding iteration counts and validating the conditions that are supposed to terminate the loop.

General guidance for the infinite loop class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
MinaApplication
Affected:< 2.0.22>= 2.1.0, < 2.1.5
Banking PaymentsApplication
Affected:= 14.5
Banking Trade Finance Process ManagementApplication
Affected:= 14.5
Banking Treasury ManagementApplication
Affected:= 14.5
Communications Cloud Native Core ConsoleApplication
Affected:= 1.9.0
Customer Management And Segmentation FoundationApplication
Affected:= 18.0= 19.0
Flexcube Universal BankingApplication
Affected:>= 14.0, <= 14.3= 14.5
Fusion Middleware Common Libraries And ToolsApplication
Affected:= 12.2.1.3.0= 12.2.1.4.0= 14.1.1.0.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.0.22 / 2.1.5 or later
Fixed in 2.0.222.1.5
Vendor patch www.openwall.com →
Recommended fix High confidence

Apache MINA 2.1.5 (or 2.0.22 for 2.0.x line users)

  1. 1. Identify all deployments and dependencies that use Apache MINA library
  2. 2. For applications using MINA 2.0.x line: upgrade to version 2.0.22 or higher
  3. 3. For applications using MINA 2.1.x line: upgrade to version 2.1.5 or higher
  4. 4. Rebuild and redeploy all affected applications with the updated MINA dependency
  5. 5. Test HTTP request handling functionality to verify the infinite loop issue is resolved
  6. 6. Monitor for any regressions in HTTP header parsing behavior

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-41973 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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