CVE-2023-24621: Yamlbeans Esoteric YamlBeans Unsafe Deserialization Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-jm7r-4pg6-gf26
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CVSS 7.8
CWE-502
Published
Advisory Summary

CVE-2023-24621 is a HIGH (CVSS 7.8) esoteric yamlbeans unsafe deserialization vulnerability vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Yamlbeans libraries in the Maven ecosystem. The issue involves esoteric yamlbeans unsafe deserialization vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2023-24621 at a Glance

CVE Identifier CVE-2023-24621
GHSA Identifier GHSA-jm7r-4pg6-gf26
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Yamlbeans
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2023-24621

To remediate this vulnerability, upgrade all affected Yamlbeans 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.esotericsoftware.yamlbeans:yamlbeans fixed: Latest secure release 
<dependency>
    <groupId>com.esotericsoftware.yamlbeans</groupId>
    <artifactId>yamlbeans</artifactId>
    <version>Latest secure release</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.esotericsoftware.yamlbeans

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2023-24621, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=com.esotericsoftware.yamlbeans

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

Note: The mvn dependency:tree -Dincludes=com.esotericsoftware.yamlbeans 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 Yamlbeans, 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

An issue was discovered in Esoteric YamlBeans through 1.15. It allows untrusted deserialisation to Java classes by default, where the data and class are controlled by the author of the YAML document being processed.

CVE-2023-24621 Affected Yamlbeans Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
com.esotericsoftware.yamlbeans:yamlbeans
maven/com.esotericsoftware.yamlbeans/yamlbeans
Maven
≤ 1.15

References

NVD — CVE-2023-24621 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-24621
Yamlbeans Security Information SECURITY
https://contrastsecurity.com
Yamlbeans Source Repository REPOSITORY
https://github.com/Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md
Yamlbeans Source Repository REPOSITORY
https://github.com/EsotericSoftware
Yamlbeans Source Repository REPOSITORY
https://github.com/EsotericSoftware/yamlbeans

Frequently Asked Questions

What is CVE-2023-24621?
CVE-2023-24621 is a security vulnerability in Yamlbeans involving Esoteric YamlBeans Unsafe Deserialization vulnerability under CWE-502: Deserialization of Untrusted Data.
Which Yamlbeans versions are affected?
Affected versions include releases prior to current release patches across affected packages: com.esotericsoftware.yamlbeans:yamlbeans.
What version fixes CVE-2023-24621?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is yamlbeans affected?
Yes, com.esotericsoftware.yamlbeans:yamlbeans is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2023-24621?
CVE-2023-24621 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-24621?
CVE-2023-24621 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-2023-24621?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=com.esotericsoftware.yamlbeans'. 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-jm7r-4pg6-gf26",
  "modified" : "2023-08-31T18:55:02Z",
  "published" : "2023-08-25T21:30:47Z",
  "aliases" : [ "CVE-2023-24621" ],
  "summary" : "Esoteric YamlBeans Unsafe Deserialization vulnerability",
  "details" : "An issue was discovered in Esoteric YamlBeans through 1.15. It allows untrusted deserialisation to Java classes by default, where the data and class are controlled by the author of the YAML document being processed.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "com.esotericsoftware.yamlbeans:yamlbeans"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.15"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-24621"
  }, {
    "type" : "WEB",
    "url" : "https://contrastsecurity.com"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/EsotericSoftware"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/EsotericSoftware/yamlbeans"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-25T22:03:42Z",
    "nvd_published_at" : "2023-08-25T20:15:07Z"
  }
}