GHSA-W3J5-Q8F2-3CQQ

Vulnerability from github – Published: 2022-05-14 01:10 – Updated: 2025-09-02 22:30
VLAI?
Summary
Concurrent Execution using Shared Resource with Improper Synchronization in Apache Tomcat
Details

A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.

Severity ?
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 9.0.0.M13"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.tomcat:tomcat-util"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.0.0.M1"
            },
            {
              "fixed": "9.0.0.M14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 8.5.8"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.tomcat:tomcat-util"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.5.0"
            },
            {
              "fixed": "8.5.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.tomcat:tomcat-util"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0-RC1"
            },
            {
              "fixed": "8.0.41"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.tomcat:tomcat-util"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.0.75"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.tomcat:tomcat-util"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.16"
            },
            {
              "fixed": "6.0.50"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2016-8745"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-07-06T19:48:38Z",
    "nvd_published_at": "2017-08-10T22:29:00Z",
    "severity": "HIGH"
  },
  "details": "A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.",
  "id": "GHSA-w3j5-q8f2-3cqq",
  "modified": "2025-09-02T22:30:26Z",
  "published": "2022-05-14T01:10:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-8745"
    },
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      "type": "WEB",
      "url": "https://github.com/apache/tomcat/commit/143bb466cf96a89e791b7db5626055ea819dad89"
    },
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      "url": "https://github.com/apache/tomcat/commit/16a57bc885e212839f1d717b94b01d154a36943a"
    },
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      "url": "https://github.com/apache/tomcat/commit/cbc9b18a845d3c8c053ac293dffda6c6c19dd92b"
    },
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      "url": "https://github.com/apache/tomcat80/commit/3dd2fec73e0de1edc1d3eb1c52a01255fdfc84e7"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2017:0455"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E"
    },
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    },
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    },
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    },
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    },
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    },
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    },
    {
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    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201705-09"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20180607-0002"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20200227165932/http://www.securityfocus.com/bid/94828"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20200517114357/http://www.securitytracker.com/id/1037432"
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    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2017:0456"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2017:0935"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apache/tomcat"
    },
    {
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      "url": "https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424@%3Cdev.tomcat.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E"
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    {
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      "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a@%3Cdev.tomcat.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "http://rhn.redhat.com/errata/RHSA-2017-0457.html"
    },
    {
      "type": "WEB",
      "url": "http://rhn.redhat.com/errata/RHSA-2017-0527.html"
    },
    {
      "type": "WEB",
      "url": "http://www.debian.org/security/2017/dsa-3754"
    },
    {
      "type": "WEB",
      "url": "http://www.debian.org/security/2017/dsa-3755"
    },
    {
      "type": "WEB",
      "url": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"
    },
    {
      "type": "WEB",
      "url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Concurrent Execution using Shared Resource with Improper Synchronization in Apache Tomcat"
}


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  • 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.
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  • 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.



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