CVE-2021-42863 : Security Advisory and Response

A buffer overflow vulnerability in JerryScript version fe3a5c0 could allow an attacker to create a fake object or arraybuffer with unlimited size.

Understanding CVE-2021-42863

This CVE identifies a specific vulnerability in JerryScript that could lead to a buffer overflow attack.

What is CVE-2021-42863?

A buffer overflow in ecma_builtin_typedarray_prototype_filter() in JerryScript version fe3a5c0 allows an attacker to construct a fake object or a fake arraybuffer with unlimited size.

The Impact of CVE-2021-42863

This vulnerability could be exploited by malicious actors to manipulate memory and potentially execute arbitrary code.
Attackers could craft specially designed objects to trigger the buffer overflow, compromising the security and stability of the system.

Technical Details of CVE-2021-42863

This section provides specific technical details about the vulnerability.

Vulnerability Description

A buffer overflow in JerryScript version fe3a5c0 enables attackers to create oversized fake objects or arraybuffers, posing a security risk.

Affected Systems and Versions

Affected Version: JerryScript version fe3a5c0
Other versions may also be susceptible if they contain the identified vulnerable code.

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the typedarray prototype filter function, creating fake objects or arraybuffers with excessive sizes.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent potential exploits.

Immediate Steps to Take

Update JerryScript to a patched version that addresses the buffer overflow vulnerability.
Monitor system logs and network traffic for any suspicious activity that could indicate an ongoing attack.

Long-Term Security Practices

Implement secure coding practices to prevent buffer overflow vulnerabilities in software development.
Regularly apply security patches and updates to maintain a robust defense against emerging threats.
Conduct security audits and penetration testing to identify and rectify security weaknesses.
Educate developers and users about buffer overflow risks and best practices to mitigate them.

Patching and Updates

Ensure timely installation of security patches released by JerryScript to fix the buffer overflow vulnerability and enhance system security.