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CVE-2023-42795 (GCVE-0-2023-42795)

Vulnerability from cvelistv5 – Published: 2023-10-10 17:42 – Updated: 2025-10-29 12:02
VLAI
Title
Apache Tomcat: Failure during request clean-up leads to sensitive data leaking to subsequent requests
Summary
Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-18 16:23 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache Tomcat Affected: 11.0.0-M1 , ≤ 11.0.0-M11 (semver)
Affected: 10.1.0-M1 , ≤ 10.1.13 (semver)
Affected: 9.0.0-M1 , ≤ 9.0.80 (semver)
Affected: 8.5.0 , ≤ 8.5.93 (semver)
Unknown: 3 , < 8.5.0 (semver)
Unknown: 10.0.0-M1 , ≤ 10.0.27 (semver)
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apache accumulo Affected: 11.0.0-m1
Affected: 10.10-m1 , ≤ 10.1.13 (semver)
Affected: 9.0.0-m1 , ≤ 9.0.80 (semver)
Affected: 8.5.0 , ≤ 8.5.93 (semver)
    cpe:2.3:a:apache:accumulo:-:*:*:*:*:*:*:*
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-08T18:28:03+00:00",
      "cve": "CVE-2023-42795",
      "id": "CVE-2023-42795",
      "initial_release_date": "2023-10-10T00:00:00+00:00",
      "product_status:fixed": "55",
      "product_status:known_affected": "26",
      "product_status:known_not_affected": "9",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "tomcat: improper cleaning of recycled objects could lead to information leak",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-42795.json",
      "version": "3"
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\"lessThanOrEqual\": \"10.1.13\"}, {\"status\": \"affected\", \"version\": \"9.0.0-M1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.0.80\"}, {\"status\": \"affected\", \"version\": \"8.5.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.5.93\"}, {\"status\": \"unknown\", \"version\": \"3\", \"lessThan\": \"8.5.0\", \"versionType\": \"semver\"}, {\"status\": \"unknown\", \"version\": \"10.0.0-M1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"10.0.27\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://lists.apache.org/thread/065jfyo583490r9j2v73nhpyxdob56lw\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could \\ncause Tomcat to skip some parts of the recycling process leading to \\ninformation leaking from the current request/response to the next.\\nOlder, EOL versions may\\u00a0also be affected.\\n\\n\\nUsers are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Incomplete Cleanup vulnerability in Apache Tomcat.\u003cp\u003eWhen recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could \\ncause Tomcat to skip some parts of the recycling process leading to \\ninformation leaking from the current request/response to the next.\u003cbr\u003eOlder, EOL versions may\u0026nbsp;also be affected.\u003cbr\u003e\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-459\", \"description\": \"CWE-459 Incomplete Cleanup\"}]}], \"providerMetadata\": {\"orgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"shortName\": \"apache\", \"dateUpdated\": \"2025-10-29T12:02:59.708Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-42795\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-29T12:02:59.708Z\", \"dateReserved\": \"2023-09-14T12:11:26.550Z\", \"assignerOrgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"datePublished\": \"2023-10-10T17:42:16.705Z\", \"assignerShortName\": \"apache\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.