CVE-2020-25649: Jackson databind XML External Entity (XXE) Injection Vulnerability

Q: What is CVE-2020-25649?

CVE-2020-25649 is a security vulnerability in Jackson databind involving XML External Entity (XXE) Injection in Jackson Databind under CWE-611: Improper Restriction of XML External Entity Reference.

Q: Which Jackson databind versions are affected?

Affected versions include releases prior to 2.6.7.4, 2.9.10.7, 2.10.5.1 across affected packages: com.fasterxml.jackson.core:jackson-databind.

Q: What version fixes CVE-2020-25649?

Upgrading to 2.6.7.4, 2.9.10.7, 2.10.5.1 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is jackson-databind affected?

Yes, com.fasterxml.jackson.core:jackson-databind is affected in releases prior to 2.6.7.4, 2.9.10.7, 2.10.5.1. Upgrade your dependency to 2.6.7.4, 2.9.10.7, 2.10.5.1 or later.

Q: What is the CVSS score of CVE-2020-25649?

CVE-2020-25649 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:H/A:N.

Q: What CWE is associated with CVE-2020-25649?

CVE-2020-25649 is classified under CWE-611: Improper Restriction of XML External Entity Reference (The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.).

Q: How can I check Maven dependencies for CVE-2020-25649?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=com.fasterxml.jackson.core'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

HIGH

Advisory Identifier: GHSA-288c-cq4h-88gq

CVSS 7.5

CWE-611

Published 2021-02-18

Advisory Summary

CVE-2020-25649 is a HIGH (CVSS 7.5) xml external entity (xxe) injection vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affecting Jackson databind libraries in the Maven ecosystem. The issue involves xml external entity (xxe) injection in jackson databind. Remediation is available by upgrading affected packages to version 2.6.7.4, 2.9.10.7, 2.10.5.1.

CVE-2020-25649 at a Glance

CVE Identifier CVE-2020-25649

GHSA Identifier GHSA-288c-cq4h-88gq

Severity HIGH

CVSS v3.1 Base Score 7.5

CWE Classification CWE-611: Improper Restriction of XML External Entity Reference

Affected Product Jackson databind

Package Ecosystem Maven

Published Date 2021-02-18

Last Updated 2024-03-15

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: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 None (C:N)

Integrity High (I:H)

Availability None (A:N)

How to Fix CVE-2020-25649

To remediate this vulnerability, upgrade all affected Jackson databind 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.fasterxml.jackson.core:jackson-databind fixed: 2.6.7.4

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.6.7.4</version>
</dependency>

com.fasterxml.jackson.core:jackson-databind fixed: 2.9.10.7

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.10.7</version>
</dependency>

com.fasterxml.jackson.core:jackson-databind fixed: 2.10.5.1

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.10.5.1</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.fasterxml.jackson.core

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-25649, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=com.fasterxml.jackson.core

Analyze the terminal output to locate any version of Jackson databind in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.6.7.4), your application is affected.

Note: The mvn dependency:tree -Dincludes=com.fasterxml.jackson.core 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-611: Improper Restriction of XML External Entity Reference, where the product processes an xml document that can contain xml entities with uris that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. In Jackson databind, 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 FasterXML Jackson Databind, where it did not have entity expansion secured properly. This flaw allows vulnerability to XML external entity (XXE) attacks. The highest threat from this vulnerability is data integrity.

CVE-2020-25649 Affected Jackson databind Versions

3 component(s)

Fixed Versions:

2.6.7.42.9.10.72.10.5.1

Product / Package	Ecosystem	Affected Versions	Fixed Version
com.fasterxml.jackson.core:jackson-databind maven/com.fasterxml.jackson.core/jackson-databind	Maven	≥ 2.6.0 < 2.6.7.4	2.6.7.4
com.fasterxml.jackson.core:jackson-databind maven/com.fasterxml.jackson.core/jackson-databind	Maven	≥ 2.7.0.0 < 2.9.10.7	2.9.10.7
com.fasterxml.jackson.core:jackson-databind maven/com.fasterxml.jackson.core/jackson-databind	Maven	≥ 2.10.0.0 < 2.10.5.1	2.10.5.1

References

NVD — CVE-2020-25649 NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-25649

Jackson databind Source Repository REPOSITORY

https://github.com/FasterXML/jackson-databind/issues/2589

Security Fix Commit FIX COMMIT

https://github.com/FasterXML/jackson-databind/commit/3d932709abd0b5390efe67451653fc9efa9db677

Security Fix Commit FIX COMMIT

https://github.com/FasterXML/jackson-databind/commit/612f971b78c60202e9cd75a299050c8f2d724a59

Jackson databind Security Information SECURITY

https://www.oracle.com/security-alerts/cpuoct2021.html

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Jackson databind Security Information SECURITY

https://www.oracle.com/security-alerts/cpujul2022.html

Jackson databind Security Information SECURITY

https://www.oracle.com/security-alerts/cpujan2022.html

Jackson databind Security Information SECURITY

https://www.oracle.com/security-alerts/cpuapr2022.html

Jackson databind Security Information SECURITY

https://www.oracle.com/security-alerts/cpuApr2021.html

Jackson databind Security Information SECURITY

https://www.oracle.com//security-alerts/cpujul2021.html

Jackson databind Security Information SECURITY

https://security.netapp.com/advisory/ntap-20210108-0007

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Jackson databind Source Repository REPOSITORY

https://github.com/FasterXML/jackson-databind

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https://bugzilla.redhat.com/show_bug.cgi?id=1887664

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Frequently Asked Questions

What is CVE-2020-25649?

CVE-2020-25649 is a security vulnerability in Jackson databind involving XML External Entity (XXE) Injection in Jackson Databind under CWE-611: Improper Restriction of XML External Entity Reference.

Which Jackson databind versions are affected?

Affected versions include releases prior to 2.6.7.4, 2.9.10.7, 2.10.5.1 across affected packages: com.fasterxml.jackson.core:jackson-databind.

What version fixes CVE-2020-25649?

Upgrading to 2.6.7.4, 2.9.10.7, 2.10.5.1 (or the latest patched release for your respective branch) resolves the vulnerability.

Is jackson-databind affected?

Yes, com.fasterxml.jackson.core:jackson-databind is affected in releases prior to 2.6.7.4, 2.9.10.7, 2.10.5.1. Upgrade your dependency to 2.6.7.4, 2.9.10.7, 2.10.5.1 or later.

What is the CVSS score of CVE-2020-25649?

CVE-2020-25649 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:H/A:N.

What CWE is associated with CVE-2020-25649?

CVE-2020-25649 is classified under CWE-611: Improper Restriction of XML External Entity Reference (The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.).

How can I check Maven dependencies for CVE-2020-25649?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=com.fasterxml.jackson.core'. 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-288c-cq4h-88gq",
  "modified" : "2024-03-15T00:30:48Z",
  "published" : "2021-02-18T20:51:54Z",
  "aliases" : [ "CVE-2020-25649" ],
  "summary" : "XML External Entity (XXE) Injection in Jackson Databind",
  "details" : "A flaw was found in FasterXML Jackson Databind, where it did not have entity expansion secured properly. This flaw allows vulnerability to XML external entity (XXE) attacks. The highest threat from this vulnerability is data integrity.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "com.fasterxml.jackson.core:jackson-databind"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.6.0"
      }, {
        "fixed" : "2.6.7.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.6.7.3"
    }
  }, {
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      "ecosystem" : "Maven",
      "name" : "com.fasterxml.jackson.core:jackson-databind"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.7.0.0"
      }, {
        "fixed" : "2.9.10.7"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.9.10.6"
    }
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      "name" : "com.fasterxml.jackson.core:jackson-databind"
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      "events" : [ {
        "introduced" : "2.10.0.0"
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        "fixed" : "2.10.5.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.10.5.0"
    }
  } ],
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    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-25649"
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  "database_specific" : {
    "cwe_ids" : [ "CWE-611" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-02-18T20:41:26Z",
    "nvd_published_at" : "2020-12-03T17:15:00Z"
  }
}

CVSS V3

7.5 HIGH

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 High (I:H)

Availability None (A:N)

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Advisory Metadata

Source ID: GHSA-288c-cq4h-88gq
Schema Version: 1.4.0
Published: 2021-02-18 20:51
Last Modified: 2024-03-15 00:30
Database Record File: advisories/github-reviewed/2021/02/GHSA-288c-cq4h-88gq/GHSA-288c-cq4h-88gq.json