CVE-2019-17531: Jackson databind Jackson-databind Polymorphic Typing Issue Vulnerability

CRITICAL
Advisory Identifier: GHSA-gjmw-vf9h-g25v
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CVSS 9.8
CWE-502
Published
Advisory Summary

CVE-2019-17531 is a CRITICAL (CVSS 9.8) jackson-databind polymorphic typing issue vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Jackson databind libraries in the Maven ecosystem. The issue involves jackson-databind polymorphic typing issue. Remediation is available by upgrading affected packages to version 2.9.10.1, 2.8.11.5, 2.6.7.3.

CVE-2019-17531 at a Glance

CVE Identifier CVE-2019-17531
GHSA Identifier GHSA-gjmw-vf9h-g25v
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Jackson databind
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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: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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2019-17531

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: 2.9.10.1 
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.10.1</version>
</dependency>
com.fasterxml.jackson.core:jackson-databind fixed: 2.8.11.5 
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.8.11.5</version>
</dependency>
com.fasterxml.jackson.core:jackson-databind fixed: 2.6.7.3 
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.6.7.3</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-2019-17531, 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 2.9.10.1), 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-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. 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 Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 prior to 2.9.10.1, 2.8.11.5, and 2.6.7.3. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the apache-log4j-extra (version 1.2.x) jar in the classpath, and an attacker can provide a JNDI service to access, it is possible to make the service execute a malicious payload.

CVE-2019-17531 Affected Jackson databind Versions

3 component(s)
Fixed Versions:
2.9.10.12.8.11.52.6.7.3
Product / Package Ecosystem Affected Versions Fixed Version
com.fasterxml.jackson.core:jackson-databind
maven/com.fasterxml.jackson.core/jackson-databind
Maven
≥ 2.9.0
< 2.9.10.1
2.9.10.1
com.fasterxml.jackson.core:jackson-databind
maven/com.fasterxml.jackson.core/jackson-databind
Maven
≥ 2.7.0
< 2.8.11.5
2.8.11.5
com.fasterxml.jackson.core:jackson-databind
maven/com.fasterxml.jackson.core/jackson-databind
Maven
< 2.6.7.3
2.6.7.3

References

NVD — CVE-2019-17531 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-17531
Jackson databind Source Repository REPOSITORY
https://github.com/FasterXML/jackson-databind/issues/2498
Security Fix Commit FIX COMMIT
https://github.com/FasterXML/jackson-databind/commit/b5a304a98590b6bb766134f9261e6566dcbbb6d0
Jackson databind Security Information SECURITY
https://www.oracle.com/security-alerts/cpuoct2020.html
Jackson databind Security Information SECURITY
https://www.oracle.com/security-alerts/cpujul2020.html
Jackson databind Security Information SECURITY
https://www.oracle.com/security-alerts/cpujan2020.html
Jackson databind Security Information SECURITY
https://www.oracle.com/security-alerts/cpuapr2020.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-20191024-0005
medium.com/@cowtowncoder/on-ja... WEB
https://medium.com/@cowtowncoder/on-jackson-cves-dont-panic-here-is-what-you-need-to-know-54cd0d6e8062
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2019/12/msg00013.html
lists.apache.org/thread.html/rf1bbc0... WEB
https://lists.apache.org/thread.html/rf1bbc0ea4a9f014cf94df9a12a6477d24a27f52741dbc87f2fd52ff2@%3Cissues.geode.apache.org%3E
lists.apache.org/thread.html/r392099... WEB
https://lists.apache.org/thread.html/r392099ed2757ff2e383b10440594e914d080511d7da1c8fed0612c1f@%3Ccommits.druid.apache.org%3E
lists.apache.org/thread.html/r1b1038... WEB
https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0@%3Cissues.bookkeeper.apache.org%3E
lists.apache.org/thread.html/b3c90d3... WEB
https://lists.apache.org/thread.html/b3c90d38f99db546de60fea65f99a924d540fae2285f014b79606ca5@%3Ccommits.pulsar.apache.org%3E
Jackson databind Source Repository REPOSITORY
https://github.com/FasterXML/jackson-databind
access.redhat.com/errata/rhsa-2020:04... WEB
https://access.redhat.com/errata/RHSA-2020:0445
access.redhat.com/errata/rhsa-2020:01... WEB
https://access.redhat.com/errata/RHSA-2020:0164
access.redhat.com/errata/rhsa-2020:01... WEB
https://access.redhat.com/errata/RHSA-2020:0161
access.redhat.com/errata/rhsa-2020:01... WEB
https://access.redhat.com/errata/RHSA-2020:0160
access.redhat.com/errata/rhsa-2020:01... WEB
https://access.redhat.com/errata/RHSA-2020:0159
access.redhat.com/errata/rhsa-2019:41... WEB
https://access.redhat.com/errata/RHSA-2019:4192

Frequently Asked Questions

What is CVE-2019-17531?
CVE-2019-17531 is a security vulnerability in Jackson databind involving jackson-databind polymorphic typing issue under CWE-502: Deserialization of Untrusted Data.
Which Jackson databind versions are affected?
Affected versions include releases prior to 2.9.10.1, 2.8.11.5, 2.6.7.3 across affected packages: com.fasterxml.jackson.core:jackson-databind.
What version fixes CVE-2019-17531?
Upgrading to 2.9.10.1, 2.8.11.5, 2.6.7.3 (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 2.9.10.1, 2.8.11.5, 2.6.7.3. Upgrade your dependency to 2.9.10.1, 2.8.11.5, 2.6.7.3 or later.
What is the CVSS score of CVE-2019-17531?
CVE-2019-17531 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-17531?
CVE-2019-17531 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Maven dependencies for CVE-2019-17531?
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 
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  "id" : "GHSA-gjmw-vf9h-g25v",
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  "severity" : [ {
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    "url" : "https://www.oracle.com/security-alerts/cpuoct2020.html"
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    "url" : "https://lists.debian.org/debian-lts-announce/2019/12/msg00013.html"
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  }, {
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  "database_specific" : {
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}