Vulnerability-Lookup

GSD-2021-43980

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

Aliases

CVE-2021-43980

Aliases

CVE-2021-43980

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{
  "GSD": {
    "alias": "CVE-2021-43980",
    "id": "GSD-2021-43980",
    "references": [
      "https://www.debian.org/security/2022/dsa-5265",
      "https://access.redhat.com/errata/RHSA-2022:7272",
      "https://access.redhat.com/errata/RHSA-2022:7273",
      "https://www.suse.com/security/cve/CVE-2021-43980.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-43980"
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      "details": "The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.",
      "id": "GSD-2021-43980",
      "modified": "2023-12-13T01:23:26.451279Z",
      "schema_version": "1.4.0"
    }
  },
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          "value": "Thanks to Adam Thomas, Richard Hernandez and Ryan Schmitt for discovering the issue and working with the Tomcat security team to identify the root cause and appropriate fix."
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                "value": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)"
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            "name": "[oss-security] 20220928 CVE-2021-43980: Apache Tomcat: Information disclosure",
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            "name": "[debian-lts-announce] 20221026 [SECURITY] [DLA 3160-1] tomcat9 security update",
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          "solution": "Unfortunately, there is no solution available yet.",
          "title": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
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}

CVE-2021-43980 (GCVE-0-2021-43980)

Vulnerability from cvelistv5 – Published: 2022-09-28 00:00 – Updated: 2025-05-21 15:00

Title

Apache Tomcat: Information disclosure

Summary

Severity

3.7 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-21 14:59 UTC

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

apache mitre root

References

4 references

URL	Tags
https://lists.apache.org/thread/3jjqbsp6j88b198x5…
http://www.openwall.com/lists/oss-security/2022/09/28/1	mailing-list
https://lists.debian.org/debian-lts-announce/2022…	mailing-list
https://www.debian.org/security/2022/dsa-5265	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 10.1.0-M1 to 10.1.0-M12 Affected: 10.0.0-M1 to 10.0.18 Affected: 9.0.0-M1 to 9.0.60 Affected: 8.5.0 to 8.5.77

Credits

Thanks to Adam Thomas, Richard Hernandez and Ryan Schmitt for discovering the issue and working with the Tomcat security team to identify the root cause and appropriate fix.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.