CVE-2018-1336: Apache Tomcat Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-m59c-jpc8-m2x4
Share
CVSS 7.5
CWE-835
Published
Advisory Summary

CVE-2018-1336 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')) affecting Apache Tomcat libraries in the Maven ecosystem. The issue involves in apache tomcat there is an improper handing of overflow in the utf-8 decoder. Remediation is available by upgrading affected packages to version 9.0.8, 8.5.31, 8.0.51, 7.0.87.

CVE-2018-1336 at a Glance

CVE Identifier CVE-2018-1336
GHSA Identifier GHSA-m59c-jpc8-m2x4
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
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:N/I:N/A:H).

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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2018-1336

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: 9.0.8 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>9.0.8</version>
</dependency>
org.apache.tomcat.embed:tomcat-embed-core fixed: 8.5.31 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>8.5.31</version>
</dependency>
org.apache.tomcat.embed:tomcat-embed-core fixed: 8.0.51 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>8.0.51</version>
</dependency>
org.apache.tomcat.embed:tomcat-embed-core fixed: 7.0.87 
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>7.0.87</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-2018-1336, 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 9.0.8), 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-835: Loop with Unreachable Exit Condition ('Infinite Loop'), where the product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. 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

An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.

CVE-2018-1336 Affected Apache Tomcat Versions

4 component(s)
Fixed Versions:
9.0.88.5.318.0.517.0.87
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 9.0.0.M9
< 9.0.8
9.0.8
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 8.5.0
< 8.5.31
8.5.31
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 8.0.0RC1
< 8.0.51
8.0.51
org.apache.tomcat.embed:tomcat-embed-core
maven/org.apache.tomcat.embed/tomcat-embed-core
Maven
≥ 7.0.28
< 7.0.87
7.0.87

References

NVD — CVE-2018-1336 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1336
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat80/commit/9e9b7fe1b5732277a26e437f1d32155de6208ef2
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/e00812b94e5830b2be3de04f4ae4ade38a700074
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/92cd494555598e99dd691712e8ee426a2f9c2e93
Security Fix Commit FIX COMMIT
https://github.com/apache/tomcat/commit/156d76a6afeef440d14044a560d6ad1d029361c4
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
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https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0@%3Cdev.tomcat.apache.org%3E
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https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E
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https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E
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https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661%40%3Cdev.tomcat.apache.org%3E
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https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc@%3Cdev.tomcat.apache.org%3E
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https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%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
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/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
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/raba0fa... WEB
https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a@%3Cdev.tomcat.apache.org%3E
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2018/09/msg00001.html
Apache Tomcat Security Information SECURITY
https://security.netapp.com/advisory/ntap-20180817-0001
support.f5.com/csp/article/k730085... WEB
https://support.f5.com/csp/article/K73008537?utm_source=f5support&amp%3Butm_medium=RSS
support.f5.com/csp/article/k730085... WEB
https://support.f5.com/csp/article/K73008537?utm_source=f5support&amp;utm_medium=RSS
usn.ubuntu.com/3723-1 WEB
https://usn.ubuntu.com/3723-1
Apache Tomcat Security Information SECURITY
https://web.archive.org/web/20190703075545/http://www.securitytracker.com/id/1041375
Apache Tomcat Security Information SECURITY
https://web.archive.org/web/20200227102810/http://www.securityfocus.com/bid/104898
Apache Tomcat Security Information SECURITY
https://www.debian.org/security/2018/dsa-4281
Apache Tomcat Security Information SECURITY
https://www.oracle.com/security-alerts/cpuapr2020.html
access.redhat.com/errata/rhea-2018:21... WEB
https://access.redhat.com/errata/RHEA-2018:2188
access.redhat.com/errata/rhea-2018:21... WEB
https://access.redhat.com/errata/RHEA-2018:2189
access.redhat.com/errata/rhsa-2018:27... WEB
https://access.redhat.com/errata/RHSA-2018:2700
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https://access.redhat.com/errata/RHSA-2018:2701
access.redhat.com/errata/rhsa-2018:27... WEB
https://access.redhat.com/errata/RHSA-2018:2740
access.redhat.com/errata/rhsa-2018:27... WEB
https://access.redhat.com/errata/RHSA-2018:2741
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https://access.redhat.com/errata/RHSA-2018:2742
access.redhat.com/errata/rhsa-2018:27... WEB
https://access.redhat.com/errata/RHSA-2018:2743
access.redhat.com/errata/rhsa-2018:29... WEB
https://access.redhat.com/errata/RHSA-2018:2921
access.redhat.com/errata/rhsa-2018:29... WEB
https://access.redhat.com/errata/RHSA-2018:2930
access.redhat.com/errata/rhsa-2018:29... WEB
https://access.redhat.com/errata/RHSA-2018:2939
access.redhat.com/errata/rhsa-2018:29... WEB
https://access.redhat.com/errata/RHSA-2018:2945
access.redhat.com/errata/rhsa-2018:37... WEB
https://access.redhat.com/errata/RHSA-2018:3768
Apache Tomcat Source Repository REPOSITORY
https://github.com/apache/tomcat
lists.apache.org/thread.html/1dd0a59... WEB
https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org%3E
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https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba@%3Cdev.tomcat.apache.org%3E
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http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180722090435.GA60759%40minotaur.apache.org%3E

Frequently Asked Questions

What is CVE-2018-1336?
CVE-2018-1336 is a security vulnerability in Apache Tomcat involving In Apache Tomcat there is an improper handing of overflow in the UTF-8 decoder under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop').
Which Apache Tomcat versions are affected?
Affected versions include releases prior to 9.0.8, 8.5.31, 8.0.51, 7.0.87 across affected packages: org.apache.tomcat.embed:tomcat-embed-core.
What version fixes CVE-2018-1336?
Upgrading to 9.0.8, 8.5.31, 8.0.51, 7.0.87 (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 9.0.8, 8.5.31, 8.0.51, 7.0.87. Upgrade your dependency to 9.0.8, 8.5.31, 8.0.51, 7.0.87 or later.
What is the CVSS score of CVE-2018-1336?
CVE-2018-1336 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:N/I:N/A:H.
What CWE is associated with CVE-2018-1336?
CVE-2018-1336 is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') (The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.).
How can I check Maven dependencies for CVE-2018-1336?
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-m59c-jpc8-m2x4",
  "modified" : "2024-02-23T17:57:09Z",
  "published" : "2018-10-17T16:32:18Z",
  "aliases" : [ "CVE-2018-1336" ],
  "summary" : "In Apache Tomcat there is an improper handing of overflow in the UTF-8 decoder ",
  "details" : "An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
    "ranges" : [ {
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        "introduced" : "9.0.0.M9"
      }, {
        "fixed" : "9.0.8"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 9.0.7"
    }
  }, {
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      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
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  }, {
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      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.28"
      }, {
        "fixed" : "7.0.87"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1336"
  }, {
    "type" : "WEB",
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  "database_specific" : {
    "cwe_ids" : [ "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:44:57Z",
    "nvd_published_at" : "2018-08-02T14:29:00Z"
  }
}