CVE-2018-11784: Apache Tomcat Apache Tomcat Open Redirect Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-5q99-f34m-67gc
Share
CVSS 4.3
CWE-601
Published
Advisory Summary

CVE-2018-11784 is a MODERATE (CVSS 4.3) apache tomcat open redirect vulnerability vulnerability (CWE-601: URL Redirection to Untrusted Site ('Open Redirect')) affecting Apache Tomcat libraries in the Maven ecosystem. The issue involves apache tomcat open redirect vulnerability. Remediation is available by upgrading affected packages to version 8.5.34, 7.0.91, 9.0.12.

CVE-2018-11784 at a Glance

CVE Identifier CVE-2018-11784
GHSA Identifier GHSA-5q99-f34m-67gc
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Affected Product Apache Tomcat
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N).

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

How to Fix CVE-2018-11784

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.embed:tomcat-embed-core fixed: 8.5.34 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>8.5.34</version>
</dependency>
org.apache.tomcat.embed:tomcat-embed-core fixed: 7.0.91 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>7.0.91</version>
</dependency>
org.apache.tomcat.embed:tomcat-embed-core fixed: 9.0.12 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>9.0.12</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.embed

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-11784, inspect your build dependencies using the Maven Dependency Plugin:

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

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 8.5.34), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.tomcat.embed 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-601: URL Redirection to Untrusted Site ('Open Redirect'), where the web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. 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

When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g. redirecting to '/foo/' when the user requested '/foo') a specially crafted URL could be used to cause the redirect to be generated to any URI of the attackers choice.

CVE-2018-11784 Affected Apache Tomcat Versions

3 component(s)
Fixed Versions:
8.5.347.0.919.0.12
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 8.5.0
< 8.5.34
8.5.34
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 7.0.23
< 7.0.91
7.0.91
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 9.0.0
< 9.0.12
9.0.12

References

NVD — CVE-2018-11784 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-11784
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/b76e1dfb3dec3789cc700f8d022c872eb947a221
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/efb860b3ff8ebcf606199b8d0d432f76898040da
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/f9f147359b7c95511b64cd99bbc47917c01b3879
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2018/10/msg00005.html
lists.apache.org/thread.html/raba0fa... WEB
https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/raba0fa... WEB
https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%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
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/r6ccee4... WEB
https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r6ccee4... WEB
https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r48c144... WEB
https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r48c144... WEB
https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r3bbb80... WEB
https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/r3bbb80... WEB
https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/eb6efa8... WEB
https://lists.apache.org/thread.html/eb6efa8d59c45a7a9eff94c4b925467d3b3fec8ba7697f3daa314b04@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/eb6efa8... WEB
https://lists.apache.org/thread.html/eb6efa8d59c45a7a9eff94c4b925467d3b3fec8ba7697f3daa314b04%40%3Cdev.tomcat.apache.org%3E
access.redhat.com/errata/rhsa-2019:01... WEB
https://access.redhat.com/errata/RHSA-2019:0130
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2018/10/msg00006.html
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZ4PX4B3QTKRM35VJAVIEOPZAF76RPBP
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BZ4PX4B3QTKRM35VJAVIEOPZAF76RPBP
seclists.org/bugtraq/2019/dec/43 WEB
https://seclists.org/bugtraq/2019/Dec/43
Apache Tomcat Security Information SECURITY
https://security.netapp.com/advisory/ntap-20181014-0002
usn.ubuntu.com/3787-1 WEB
https://usn.ubuntu.com/3787-1
Apache Tomcat Security Information SECURITY
https://web.archive.org/web/20200227030058/http://www.securityfocus.com/bid/105524
Apache Tomcat Security Information SECURITY
https://www.debian.org/security/2019/dsa-4596
Apache Tomcat Security Information SECURITY
https://www.oracle.com/security-alerts/cpuapr2020.html
Apache Tomcat Security Information SECURITY
https://www.oracle.com/security-alerts/cpujan2020.html
Apache Tomcat Security Information SECURITY
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
Apache Tomcat Security Information SECURITY
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
Apache Tomcat Security Information SECURITY
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
Apache Tomcat Security Information SECURITY
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
access.redhat.com/errata/rhsa-2019:01... WEB
https://access.redhat.com/errata/RHSA-2019:0131
access.redhat.com/errata/rhsa-2019:04... WEB
https://access.redhat.com/errata/RHSA-2019:0485
access.redhat.com/errata/rhsa-2019:15... WEB
https://access.redhat.com/errata/RHSA-2019:1529
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-5q99-f34m-67gc
Apache Tomcat Source Repository REPOSITORY
https://github.com/apache/tomcat
kc.mcafee.com/corporate/index WEB
https://kc.mcafee.com/corporate/index?page=content&id=SB10284
lists.apache.org/thread.html/1dd0a59... WEB
https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/1dd0a59... WEB
https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba@%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/23134c9... WEB
https://lists.apache.org/thread.html/23134c9b5a23892a205dc140cdd8c9c0add233600f76b313dda6bd75%40%3Cannounce.tomcat.apache.org%3E
lists.apache.org/thread.html/23134c9... WEB
https://lists.apache.org/thread.html/23134c9b5a23892a205dc140cdd8c9c0add233600f76b313dda6bd75@%3Cannounce.tomcat.apache.org%3E
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/388a323... WEB
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lists.apache.org/thread.html/388a323... WEB
https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708@%3Cdev.tomcat.apache.org%3E
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lists.apache.org/thread.html/3d19773... WEB
https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7@%3Cdev.tomcat.apache.org%3E
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lists.apache.org/thread.html/845312a... WEB
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lists.apache.org/thread.html/8885587... WEB
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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/e85e83e... WEB
https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661%40%3Cdev.tomcat.apache.org%3E
lists.apache.org/thread.html/e85e83e... WEB
https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661@%3Cdev.tomcat.apache.org%3E
Apache Tomcat Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00030.html
Apache Tomcat Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html
Apache Tomcat Security Information SECURITY
http://packetstormsecurity.com/files/163456/Apache-Tomcat-9.0.0M1-Open-Redirect.html

Frequently Asked Questions

What is CVE-2018-11784?
CVE-2018-11784 is a security vulnerability in Apache Tomcat involving Apache Tomcat Open Redirect vulnerability under CWE-601: URL Redirection to Untrusted Site ('Open Redirect').
Which Apache Tomcat versions are affected?
Affected versions include releases prior to 8.5.34, 7.0.91, 9.0.12 across affected packages: org.apache.tomcat.embed:tomcat-embed-core.
What version fixes CVE-2018-11784?
Upgrading to 8.5.34, 7.0.91, 9.0.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is tomcat-embed-core affected?
Yes, org.apache.tomcat.embed:tomcat-embed-core is affected in releases prior to 8.5.34, 7.0.91, 9.0.12. Upgrade your dependency to 8.5.34, 7.0.91, 9.0.12 or later.
What is the CVSS score of CVE-2018-11784?
CVE-2018-11784 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2018-11784?
CVE-2018-11784 is classified under CWE-601: URL Redirection to Untrusted Site ('Open Redirect') (The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.).
How can I check Maven dependencies for CVE-2018-11784?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.tomcat.embed'. 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
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5q99-f34m-67gc",
  "modified" : "2024-02-22T22:43:50Z",
  "published" : "2018-10-17T16:31:02Z",
  "aliases" : [ "CVE-2018-11784" ],
  "summary" : "Apache Tomcat Open Redirect vulnerability",
  "details" : "When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g. redirecting to '/foo/' when the user requested '/foo') a specially crafted URL could be used to cause the redirect to be generated to any URI of the attackers choice.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"
  } ],
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      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
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    } ]
  } ],
  "references" : [ {
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    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-11784"
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  "database_specific" : {
    "cwe_ids" : [ "CWE-601" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:17:07Z",
    "nvd_published_at" : "2018-10-04T13:29:00Z"
  }
}