CVE-2016-6797: Apache Tomcat Incorrect Authorization Vulnerability

HIGH
Advisory Identifier: GHSA-q6x7-f33r-3wxx
CVSS 7.5
CWE-863
Published
Advisory Summary

CVE-2016-6797 is a HIGH (CVSS 7.5) incorrect authorization vulnerability (CWE-863: Incorrect Authorization) affecting Apache Tomcat libraries in the Maven ecosystem. The issue involves incorrect authorization in apache tomcat. Remediation is available by upgrading affected packages to version 9.0.0.M10, 8.5.5, 8.0.37, 7.0.72.

CVE-2016-6797 at a Glance

CVE Identifier CVE-2016-6797
GHSA Identifier GHSA-q6x7-f33r-3wxx
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-863: Incorrect Authorization
Affected Product Apache Tomcat
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2016-6797

To remediate this vulnerability, upgrade all affected Apache Tomcat dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.tomcat:tomcat fixed: 9.0.0.M10
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</artifactId>
    <version>9.0.0.M10</version>
</dependency>
org.apache.tomcat:tomcat fixed: 8.5.5
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</artifactId>
    <version>8.5.5</version>
</dependency>
org.apache.tomcat:tomcat fixed: 8.0.37
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</artifactId>
    <version>8.0.37</version>
</dependency>
org.apache.tomcat:tomcat fixed: 7.0.72
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat</artifactId>
    <version>7.0.72</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

mvn dependency:tree -Dincludes=org.apache.tomcat

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2016-6797, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.tomcat

Analyze the terminal output to locate any version of Apache Tomcat in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.0.0.M10), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.tomcat command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Apache Tomcat, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The ResourceLinkFactory implementation in Apache Tomcat 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not limit web application access to global JNDI resources to those resources explicitly linked to the web application. Therefore, it was possible for a web application to access any global JNDI resource whether an explicit ResourceLink had been configured or not.

CVE-2016-6797 Affected Apache Tomcat Versions

4 component(s)
Fixed Versions:
9.0.0.M108.5.58.0.377.0.72
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.tomcat:tomcat
Maven
≥ 9.0.0.M1
< 9.0.0.M10
9.0.0.M10
org.apache.tomcat:tomcat
Maven
≥ 8.5.0
< 8.5.5
8.5.5
org.apache.tomcat:tomcat
Maven
≥ 8.0.0
< 8.0.37
8.0.37
org.apache.tomcat:tomcat
Maven
≥ 7.0.0
< 7.0.72
7.0.72

References

NVD — CVE-2016-6797 NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-6797
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/2859ac3eae132383cb6f3f2042e25d7a4a281b0d
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/b3406e6c318378cbf440f902f9fdbb8b440aef4e
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/d6b5600afe75e1086dd564344e1d085966e4237d
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat80/commit/824c7dc781056442046db0ae34bcf1497f23f44c
lists.apache.org/thread.html/9325837... WEB
https://lists.apache.org/thread.html/9325837eb00cba5752c092047433c7f0415134d16e7f391447ff4352%40%3Cannounce.tomcat.apache.org%3E
lists.apache.org/thread.html/9325837... WEB
https://lists.apache.org/thread.html/9325837eb00cba5752c092047433c7f0415134d16e7f391447ff4352@%3Cannounce.tomcat.apache.org%3E
usn.ubuntu.com/4557-1 WEB
https://usn.ubuntu.com/4557-1
lists.apache.org/thread.html/b5e3f51... WEB
https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/b5e3f51... WEB
https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/b84ad12... WEB
https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/b84ad12... WEB
https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/b8a1bf1... WEB
https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/b8a1bf1... WEB
https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r03c597... WEB
https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r03c597... WEB
https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r587e50... WEB
https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r587e50... WEB
https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r9136ff... WEB
https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r9136ff... WEB
https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c@%3Cdev.tomcat.apache.org%3E
Apache Tomcat Security Information SECURITY
https://security.netapp.com/advisory/ntap-20180605-0001
Apache Tomcat Security Information SECURITY
https://web.archive.org/web/20170320064509/http://www.securitytracker.com/id/1037145
Apache Tomcat Security Information SECURITY
https://web.archive.org/web/20170423095945/http://www.securityfocus.com/bid/93940
Apache Tomcat Security Information SECURITY
https://www.oracle.com/security-alerts/cpuoct2021.html
access.redhat.com/errata/rhsa-2017:04... WEB
https://access.redhat.com/errata/RHSA-2017:0455
access.redhat.com/errata/rhsa-2017:04... WEB
https://access.redhat.com/errata/RHSA-2017:0456
access.redhat.com/errata/rhsa-2017:22... WEB
https://access.redhat.com/errata/RHSA-2017:2247
Apache Tomcat Source Repository REPOSITORY
https://github.com/apache/tomcat
lists.apache.org/thread.html/343558d... WEB
https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/343558d... WEB
https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/3722040... WEB
https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/3722040... WEB
https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/388a323... WEB
https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/388a323... WEB
https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/39ae1f0... WEB
https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/39ae1f0... WEB
https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/3d19773... WEB
https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/3d19773... WEB
https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/6af4712... WEB
https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/6af4712... WEB
https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/845312a... WEB
https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/845312a... WEB
https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/8885587... WEB
https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/8885587... WEB
https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a@%3Cdev.tomcat.apache.org%3E
rhn.redhat.com/errata/rhsa-2017-04... WEB
http://rhn.redhat.com/errata/RHSA-2017-0457.html
Apache Tomcat Security Information SECURITY
http://www.debian.org/security/2016/dsa-3720

Frequently Asked Questions

What is CVE-2016-6797?
CVE-2016-6797 is a security vulnerability in Apache Tomcat involving Incorrect Authorization in Apache Tomcat under CWE-863: Incorrect Authorization.
Which Apache Tomcat versions are affected?
Affected versions include releases prior to 9.0.0.M10, 8.5.5, 8.0.37, 7.0.72 across affected packages: org.apache.tomcat:tomcat.
What version fixes CVE-2016-6797?
Upgrading to 9.0.0.M10, 8.5.5, 8.0.37, 7.0.72 (or the latest patched release for your respective branch) resolves the vulnerability.
Is tomcat affected?
Yes, org.apache.tomcat:tomcat is affected in releases prior to 9.0.0.M10, 8.5.5, 8.0.37, 7.0.72. Upgrade your dependency to 9.0.0.M10, 8.5.5, 8.0.37, 7.0.72 or later.
What is the CVSS score of CVE-2016-6797?
CVE-2016-6797 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2016-6797?
CVE-2016-6797 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check Maven dependencies for CVE-2016-6797?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.tomcat'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-q6x7-f33r-3wxx",
  "modified" : "2024-02-23T16:16:51Z",
  "published" : "2022-05-13T01:02:15Z",
  "aliases" : [ "CVE-2016-6797" ],
  "summary" : "Incorrect Authorization in Apache Tomcat",
  "details" : "The ResourceLinkFactory implementation in Apache Tomcat 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not limit web application access to global JNDI resources to those resources explicitly linked to the web application. Therefore, it was possible for a web application to access any global JNDI resource whether an explicit ResourceLink had been configured or not.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0.M1"
      }, {
        "fixed" : "9.0.0.M10"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 9.0.0.M9"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.5.0"
      }, {
        "fixed" : "8.5.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 8.5.4"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
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      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.0.37"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 8.0.36"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.0.72"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2016-6797"
  }, {
    "type" : "WEB",
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    "url" : "https://github.com/apache/tomcat80/commit/824c7dc781056442046db0ae34bcf1497f23f44c"
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    "url" : "https://lists.apache.org/thread.html/9325837eb00cba5752c092047433c7f0415134d16e7f391447ff4352%40%3Cannounce.tomcat.apache.org%3E"
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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.netapp.com/advisory/ntap-20180605-0001"
  }, {
    "type" : "WEB",
    "url" : "https://usn.ubuntu.com/4557-1"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20170320064509/http://www.securitytracker.com/id/1037145"
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    "url" : "https://web.archive.org/web/20170423095945/http://www.securityfocus.com/bid/93940"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpuoct2021.html"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2017:0455"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2017:0456"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2017:2247"
  }, {
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  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-07-06T19:45:35Z",
    "nvd_published_at" : "2017-08-10T22:29:00Z"
  }
}