Main Vulnerability Database Vulnerabilities #VU42769

Input validation error in js-yaml (npm) - CVE-2013-4660

Published: June 28, 2013 / Updated: August 11, 2020

Vulnerability identifier: #VU42769

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2013-4660

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The JS-YAML module before 2.0.5 for Node.js parses input without properly considering the unsafe !!js/function tag, which allows remote attackers to execute arbitrary code via a crafted string that triggers an eval operation.

Affected software

js-yaml (npm)

How to mitigate CVE-2013-4660

Install update from vendor's website.

Links to Public Exploits and PoC-codes

Exploit #4380 - Nodejs - js-yaml load() Code Exec (Metasploit) (August 11, 2020)
Exploit #4113 - Nodejs js-yaml load() Code Execution (August 11, 2020)

External References

http://portal.nodesecurity.io/advisories/js-yaml
https://nealpoole.com/blog/2013/06/code-execution-via-yaml-in-js-yaml-nodejs-module/

Related Security Bulletins

Input validation error in js-yaml (npm)