CVE-2018-12418: Junrar Junrar Vulnerable To Infinite Loop Vulnerability

MODERATE
Advisory Identifier: GHSA-5xqr-grq4-qwgx
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CVSS 5.5
CWE-835
Published
Advisory Summary

CVE-2018-12418 is a MODERATE (CVSS 5.5) junrar vulnerable to infinite loop vulnerability (CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')) affecting Junrar libraries in the Maven ecosystem. The issue involves junrar vulnerable to infinite loop. Remediation is available by upgrading affected packages to version 1.0.1.

CVE-2018-12418 at a Glance

CVE Identifier CVE-2018-12418
GHSA Identifier GHSA-5xqr-grq4-qwgx
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Product Junrar
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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

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

How to Fix CVE-2018-12418

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

com.github.junrar:junrar fixed: 1.0.1 
<dependency>
    <groupId>com.github.junrar</groupId>
    <artifactId>junrar</artifactId>
    <version>1.0.1</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=com.github.junrar

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-12418, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=com.github.junrar

Analyze the terminal output to locate any version of Junrar in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.1), your application is affected.

Note: The mvn dependency:tree -Dincludes=com.github.junrar 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 Junrar, 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

Archive.java in Junrar before 1.0.1, as used in Apache Tika and other products, is affected by a denial of service vulnerability due to an infinite loop when handling corrupt RAR files.

CVE-2018-12418 Affected Junrar Versions

1 component(s)
Fixed Versions:
1.0.1
Product / Package Ecosystem Affected Versions Fixed Version
com.github.junrar:junrar
maven/com.github.junrar/junrar
Maven
< 1.0.1
1.0.1

References

NVD — CVE-2018-12418 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-12418
Junrar Source Repository REPOSITORY
https://github.com/junrar/junrar/pull/8
Security Fix Commit FIX COMMIT
https://github.com/junrar/junrar/commit/ad8d0ba8e155630da8a1215cee3f253e0af45817
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-5xqr-grq4-qwgx
Junrar Source Repository REPOSITORY
https://github.com/junrar/junrar

Frequently Asked Questions

What is CVE-2018-12418?
CVE-2018-12418 is a security vulnerability in Junrar involving Junrar vulnerable to Infinite Loop under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop').
Which Junrar versions are affected?
Affected versions include releases prior to 1.0.1 across affected packages: com.github.junrar:junrar.
What version fixes CVE-2018-12418?
Upgrading to 1.0.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is junrar affected?
Yes, com.github.junrar:junrar is affected in releases prior to 1.0.1. Upgrade your dependency to 1.0.1 or later.
What is the CVSS score of CVE-2018-12418?
CVE-2018-12418 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2018-12418?
CVE-2018-12418 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-2018-12418?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=com.github.junrar'. 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-5xqr-grq4-qwgx",
  "modified" : "2022-11-17T18:39:50Z",
  "published" : "2018-10-17T00:04:05Z",
  "aliases" : [ "CVE-2018-12418" ],
  "summary" : "Junrar vulnerable to Infinite Loop",
  "details" : "Archive.java in Junrar before 1.0.1, as used in Apache Tika and other products, is affected by a denial of service vulnerability due to an infinite loop when handling corrupt RAR files.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "com.github.junrar:junrar"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-12418"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/junrar/junrar/pull/8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/junrar/junrar/commit/ad8d0ba8e155630da8a1215cee3f253e0af45817"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-5xqr-grq4-qwgx"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/junrar/junrar"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-835" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:17:41Z",
    "nvd_published_at" : null
  }
}