CVE-2022-3782: Keycloak parent Path Traversal Vulnerability

CRITICAL
Advisory Identifier: GHSA-g8q8-fggx-9r3q
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CVSS 9.1
CWE-177 CWE-22
Published
Advisory Summary

CVE-2022-3782 is a CRITICAL (CVSS 9.1) path traversal vulnerability (CWE-177: Improper Handling of URL Encoding (Hex Encoding)) affecting Keycloak parent libraries in the Maven ecosystem. The issue involves keycloak vulnerable to path traversal via double url encoding. Remediation is available by upgrading affected packages to version 20.0.2.

CVE-2022-3782 at a Glance

CVE Identifier CVE-2022-3782
GHSA Identifier GHSA-g8q8-fggx-9r3q
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-177: Improper Handling of URL Encoding (Hex Encoding)
Affected Product Keycloak parent
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.1

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:H/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 High (I:H)
Availability None (A:N)

How to Fix CVE-2022-3782

To remediate this vulnerability, upgrade all affected Keycloak parent 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.keycloak:keycloak-parent fixed: 20.0.2 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-parent</artifactId>
    <version>20.0.2</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.keycloak

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2022-3782, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Keycloak parent in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 20.0.2), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.keycloak 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-177: Improper Handling of URL Encoding (Hex Encoding), where the product does not properly handle when all or part of an input has been url encoded. In Keycloak parent, 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

Keycloak does not properly validate URLs included in a redirect. An attacker could construct a malicious request to bypass validation and access other URLs and potentially sensitive information within the domain, or possibly conduct further attacks.

CVE-2022-3782 Affected Keycloak parent Versions

1 component(s)
Fixed Versions:
20.0.2
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-parent
maven/org.keycloak/keycloak-parent
Maven
< 20.0.2
20.0.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/keycloak/keycloak/security/advisories/GHSA-g8q8-fggx-9r3q
NVD — CVE-2022-3782 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-3782
Keycloak parent Source Repository REPOSITORY
https://github.com/keycloak/keycloak/pull/15982/commits/1987c942f527b9f3bbf2a86ba71ba8ae0154ac37
Keycloak parent Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2022-3782
Keycloak parent Source Repository REPOSITORY
https://github.com/keycloak/keycloak

Frequently Asked Questions

What is CVE-2022-3782?
CVE-2022-3782 is a security vulnerability in Keycloak parent involving Keycloak vulnerable to path traversal via double URL encoding under CWE-177: Improper Handling of URL Encoding (Hex Encoding).
Which Keycloak parent versions are affected?
Affected versions include releases prior to 20.0.2 across affected packages: org.keycloak:keycloak-parent.
What version fixes CVE-2022-3782?
Upgrading to 20.0.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-parent affected?
Yes, org.keycloak:keycloak-parent is affected in releases prior to 20.0.2. Upgrade your dependency to 20.0.2 or later.
What is the CVSS score of CVE-2022-3782?
CVE-2022-3782 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2022-3782?
CVE-2022-3782 is classified under CWE-177: Improper Handling of URL Encoding (Hex Encoding) (The product does not properly handle when all or part of an input has been URL encoded.).
How can I check Maven dependencies for CVE-2022-3782?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.keycloak'. 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-g8q8-fggx-9r3q",
  "modified" : "2023-01-25T21:37:00Z",
  "published" : "2022-12-13T19:44:56Z",
  "aliases" : [ "CVE-2022-3782" ],
  "summary" : "Keycloak vulnerable to path traversal via double URL encoding ",
  "details" : "Keycloak does not properly validate URLs included in a redirect. An attacker could construct a malicious request to bypass validation and access other URLs and potentially sensitive information within the domain, or possibly conduct further attacks.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-parent"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "20.0.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 20.0.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/security/advisories/GHSA-g8q8-fggx-9r3q"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-3782"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/pull/15982/commits/1987c942f527b9f3bbf2a86ba71ba8ae0154ac37"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2022-3782"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keycloak/keycloak"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-177", "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-13T19:44:56Z",
    "nvd_published_at" : "2023-01-13T06:15:00Z"
  }
}