CVE-2020-10770: Keycloak core Keycloak Vulnerable To Server-Side Request Vulnerability

MODERATE
Advisory Identifier: GHSA-jh7q-5mwf-qvhw
Share
CVSS 5.3
CWE-601 CWE-918
Published
Advisory Summary

CVE-2020-10770 is a MODERATE (CVSS 5.3) keycloak vulnerable to server-side request vulnerability (CWE-601: URL Redirection to Untrusted Site ('Open Redirect')) affecting Keycloak core libraries in the Maven ecosystem. The issue involves keycloak vulnerable to server-side request forgery. Remediation is available by upgrading affected packages to version 13.0.0.

CVE-2020-10770 at a Glance

CVE Identifier CVE-2020-10770
GHSA Identifier GHSA-jh7q-5mwf-qvhw
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Affected Product Keycloak core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:L/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 None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2020-10770

To remediate this vulnerability, upgrade all affected Keycloak core 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-core fixed: 13.0.0 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-core</artifactId>
    <version>13.0.0</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-2020-10770, 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 core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 13.0.0), 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-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 Keycloak core, 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

A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified URL using the OIDC parameter `request_uri`. This flaw allows an attacker to use this parameter to execute a Server-side request forgery (SSRF) attack.

CVE-2020-10770 Affected Keycloak core Versions

1 component(s)
Fixed Versions:
13.0.0
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-core
maven/org.keycloak/keycloak-core
Maven
< 13.0.0
13.0.0

References

NVD — CVE-2020-10770 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-10770
Keycloak core Source Repository REPOSITORY
https://github.com/keycloak/keycloak-documentation/pull/1086
Keycloak core Source Repository REPOSITORY
https://github.com/keycloak/keycloak/pull/7714
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1846270
Keycloak core Source Repository REPOSITORY
https://github.com/keycloak/keycloak
issues.redhat.com/browse/keycloak-140... WEB
https://issues.redhat.com/browse/KEYCLOAK-14019
issues.redhat.com/browse/keycloak-342... WEB
https://issues.redhat.com/browse/KEYCLOAK-3426
Keycloak core Security Information SECURITY
http://packetstormsecurity.com/files/164499/Keycloak-12.0.1-Server-Side-Request-Forgery.html

Frequently Asked Questions

What is CVE-2020-10770?
CVE-2020-10770 is a security vulnerability in Keycloak core involving Keycloak vulnerable to Server-Side Request Forgery under CWE-601: URL Redirection to Untrusted Site ('Open Redirect').
Which Keycloak core versions are affected?
Affected versions include releases prior to 13.0.0 across affected packages: org.keycloak:keycloak-core.
What version fixes CVE-2020-10770?
Upgrading to 13.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-core affected?
Yes, org.keycloak:keycloak-core is affected in releases prior to 13.0.0. Upgrade your dependency to 13.0.0 or later.
What is the CVSS score of CVE-2020-10770?
CVE-2020-10770 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2020-10770?
CVE-2020-10770 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-2020-10770?
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-jh7q-5mwf-qvhw",
  "modified" : "2022-10-07T21:28:47Z",
  "published" : "2022-05-24T17:36:27Z",
  "aliases" : [ "CVE-2020-10770" ],
  "summary" : "Keycloak vulnerable to Server-Side Request Forgery",
  "details" : "A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified URL using the OIDC parameter `request_uri`. This flaw allows an attacker to use this parameter to execute a Server-side request forgery (SSRF) attack.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "13.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-10770"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak-documentation/pull/1086"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/pull/7714"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1846270"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keycloak/keycloak"
  }, {
    "type" : "WEB",
    "url" : "https://issues.redhat.com/browse/KEYCLOAK-14019"
  }, {
    "type" : "WEB",
    "url" : "https://issues.redhat.com/browse/KEYCLOAK-3426"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/164499/Keycloak-12.0.1-Server-Side-Request-Forgery.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-601", "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-10-07T21:28:47Z",
    "nvd_published_at" : "2020-12-15T20:15:00Z"
  }
}