CVE-2020-23308 : Security Advisory and Response

This CVE-2020-23308 article provides insights into a vulnerability found in JerryScript 2.2.0, impacting the parser_parse_expression function.

Understanding CVE-2020-23308

What is CVE-2020-23308?

CVE-2020-23308 is a vulnerability in JerryScript 2.2.0, specifically in the parser_parse_expression function, leading to an assertion failure.

The Impact of CVE-2020-23308

The vulnerability can potentially be exploited by attackers to cause a denial of service or execute arbitrary code on affected systems.

Technical Details of CVE-2020-23308

Vulnerability Description

The issue arises from an assertion failure 'context_p->stack_top_uint8 == LEXER_EXPRESSION_START' at js-parser-expr.c:3565 in parser_parse_expression.

Affected Systems and Versions

Vendor: N/A
Product: N/A
Version: JerryScript 2.2.0

Exploitation Mechanism

Attackers can exploit this vulnerability to trigger the assertion failure, potentially leading to a denial of service or arbitrary code execution.

Mitigation and Prevention

Immediate Steps to Take

Update JerryScript to a patched version or apply relevant security fixes.
Monitor for any unusual activities on the system that could indicate exploitation.

Long-Term Security Practices

Regularly update software and libraries to mitigate known vulnerabilities.
Implement code review processes to catch similar issues during development.

Patching and Updates

Ensure timely application of security patches and updates to address vulnerabilities like CVE-2020-23308.