CVE-2020-17527 (GCVE-0-2020-17527)

Vulnerability from cvelistv5 – Published: 2020-12-03 18:30 – Updated: 2025-02-13 16:27
VLAI
Title
Apache Tomcat: Request header mix-up between HTTP/2 streams
Summary
While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
Assigner
References
URL Tags
https://lists.apache.org/thread.html/rce5ac9a4017… x_refsource_MISC
https://lists.apache.org/thread.html/r8a227ac6a75… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/raa0e9ad388c… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rce5ac9a4017… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rd5babd13d7a… mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2020/12/03/3 mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rabbe6b3ae6a… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/ra35c8d617b1… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9fd47f1b03e… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r26a2a663390… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202012-23 vendor-advisoryx_refsource_GENTOO
https://lists.apache.org/thread.html/rca833c6d42b… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/ra9fcdb904dd… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r5a285242737… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/ra9fcdb904dd… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rbba08c4dcef… mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4835 vendor-advisoryx_refsource_DEBIAN
https://lists.apache.org/thread.html/r2d6e05c5ff9… mailing-listx_refsource_MLIST
https://www.oracle.com/security-alerts/cpuApr2021.html x_refsource_MISC
https://security.netapp.com/advisory/ntap-2020121… x_refsource_CONFIRM
https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpujan2022.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC
Impacted products
Vendor Product Version
Apache Software Foundation Apache Tomcat Affected: Apache Tomcat 10 10.0.0-M1 to 10.0.0-M9
Affected: Apache Tomcat 9 9.0.0-M1 to 9.0.39
Affected: Apache Tomcat 8.5 8.5.0 to 8.5.59
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.\"}, {\"lang\": \"es\", \"value\": \"Al investigar el error 64830, se detect\\u00f3 que Apache Tomcat versiones 10.0.0-M1 hasta 10.0.0-M9, versiones 9.0.0-M1 hasta 9.0.39 y versiones 8.5.0 hasta 8.5.59, podr\\u00eda reutilizar un valor de encabezado de petici\\u00f3n HTTP de la transmisi\\u00f3n anterior recibida en una conexi\\u00f3n HTTP/2 para la petici\\u00f3n asociada con la transmisi\\u00f3n posterior.\u0026#xa0;Si bien esto probablemente conllevar\\u00eda a un error y al cierre de la conexi\\u00f3n HTTP/2, es posible que la informaci\\u00f3n podr\\u00eda filtrarse entre peticiones\"}]",
      "id": "CVE-2020-17527",
      "lastModified": "2024-11-21T05:08:17.910",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:P/I:N/A:N\", \"baseScore\": 5.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 10.0, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2020-12-03T19:15:12.200",
      "references": "[{\"url\": \"http://www.openwall.com/lists/oss-security/2020/12/03/3\", \"source\": \"security@apache.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.apache.org/thread.html/r26a2a66339087fc37db3caf201e446d3e83b5cce314371e235ff1784%40%3Ccommits.tomee.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/r2d6e05c5ff96f8068a59dfdb3800e9ee8d4e36ce1971783c6e5f9b20%40%3Ccommits.tomee.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/r5a285242737ddef4d338236328aaaf3237183e1465a5efafd16b99ed%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": \"https://lists.apache.org/thread.html/r8a227ac6a755a6406c1cc47dd48800e973d4cf13fe7fe68ac59c679c%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"security@apache.org\"}, {\"url\": 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\"Third Party Advisory\"]}, {\"url\": \"https://www.oracle.com/security-alerts/cpuApr2021.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://www.oracle.com/security-alerts/cpuapr2022.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://www.oracle.com/security-alerts/cpujan2022.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}]",
      "sourceIdentifier": "security@apache.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"security@apache.org\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-200\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-200\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-17527\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2020-12-03T19:15:12.200\",\"lastModified\":\"2024-11-21T05:08:17.910\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.\"},{\"lang\":\"es\",\"value\":\"Al investigar el error 64830, se detect\u00f3 que Apache Tomcat versiones 10.0.0-M1 hasta 10.0.0-M9, versiones 9.0.0-M1 hasta 9.0.39 y versiones 8.5.0 hasta 8.5.59, podr\u00eda reutilizar un valor de encabezado de petici\u00f3n HTTP de la transmisi\u00f3n anterior recibida en una conexi\u00f3n HTTP/2 para la petici\u00f3n asociada con la transmisi\u00f3n posterior.\u0026#xa0;Si bien esto probablemente conllevar\u00eda a un error y al cierre de la conexi\u00f3n HTTP/2, es posible que la informaci\u00f3n podr\u00eda filtrarse entre peticiones\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:N/A:N\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security@apache.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-200\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-200\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.5.1\",\"versionEndIncluding\":\"8.5.59\",\"matchCriteriaId\":\"331F7519-79B9-480B-AF4F-E976C003F044\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.0.1\",\"versionEndIncluding\":\"9.0.35\",\"matchCriteriaId\":\"FFF08CD9-EBB1-448B-A8E8-C940C77B1D5E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:*\",\"matchCriteriaId\":\"89B129B2-FB6F-4EF9-BF12-E589A87996CF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B6787B6-54A8-475E-BA1C-AB99334B2535\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:*\",\"matchCriteriaId\":\"EABB6FBC-7486-44D5-A6AD-FFF1D3F677E1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:*\",\"matchCriteriaId\":\"E10C03BC-EE6B-45B2-83AE-9E8DFB58D7DB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:*\",\"matchCriteriaId\":\"8A6DA0BE-908C-4DA8-A191-A0113235E99A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:*\",\"matchCriteriaId\":\"39029C72-28B4-46A4-BFF5-EC822CFB2A4C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:*\",\"matchCriteriaId\":\"1A2E05A3-014F-4C4D-81E5-88E725FBD6AD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:*\",\"matchCriteriaId\":\"166C533C-0833-41D5-99B6-17A4FAB3CAF0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:*\",\"matchCriteriaId\":\"D3768C60-21FA-4B92-B98C-C3A2602D1BC4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:*\",\"matchCriteriaId\":\"DDD510FA-A2E4-4BAF-A0DE-F4E5777E9325\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone20:*:*:*:*:*:*\",\"matchCriteriaId\":\"C2409CC7-6A85-4A66-A457-0D62B9895DC1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone21:*:*:*:*:*:*\",\"matchCriteriaId\":\"B392A7E5-4455-4B1C-8FAC-AE6DDC70689E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone22:*:*:*:*:*:*\",\"matchCriteriaId\":\"EF411DDA-2601-449A-9046-D250419A0E1A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:*\",\"matchCriteriaId\":\"D7D8F2F4-AFE2-47EA-A3FD-79B54324DE02\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:*\",\"matchCriteriaId\":\"1B4FBF97-DE16-4E5E-BE19-471E01818D40\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:*\",\"matchCriteriaId\":\"3B266B1E-24B5-47EE-A421-E0E3CC0C7471\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:*\",\"matchCriteriaId\":\"29614C3A-6FB3-41C7-B56E-9CC3F45B04F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:*\",\"matchCriteriaId\":\"C6AB156C-8FF6-4727-AF75-590D0DCB3F9D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:*\",\"matchCriteriaId\":\"49AAF4DF-F61D-47A8-8788-A21E317A145D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9.0.0:milestone6:*:*:*:*:*:*\",\"matchCriteriaId\":\"454211D0-60A2-4661-AECA-4C0121413FEB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:tomcat:9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  }
}


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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.