CVE-2017-11343 : Security Advisory and Response

CHICKEN Scheme versions 4.12.0 and below are susceptible to an algorithmic complexity attack due to an unaddressed resolution for CVE-2012-6125. Any input deliberately manipulated by an attacker and inserted into the symbol table will lead to an O(n) lookup time.

Understanding CVE-2017-11343

CHICKEN Scheme vulnerability with potential algorithmic complexity attack.

What is CVE-2017-11343?

CHICKEN Scheme versions up to and including 4.12.0 are vulnerable to an algorithmic complexity attack due to an incomplete fix for CVE-2012-6125. Crafted input can lead to O(n) lookup time.

The Impact of CVE-2017-11343

Allows attackers to manipulate input leading to a significant increase in lookup time

Technical Details of CVE-2017-11343

CHICKEN Scheme vulnerability details.

Vulnerability Description

The vulnerability allows attackers to exploit the symbol table, resulting in a significant increase in lookup time.

Affected Systems and Versions

Product: CHICKEN Scheme
Vendor: N/A
Versions affected: Up to and including 4.12.0

Exploitation Mechanism

Attackers can provide crafted input to the symbol table, causing O(n) lookup time.

Mitigation and Prevention

Steps to mitigate the CVE-2017-11343 vulnerability.

Immediate Steps to Take

Update CHICKEN Scheme to a version beyond 4.12.0
Avoid inserting manipulated input into the symbol table

Long-Term Security Practices

Regularly update software to the latest versions
Implement input validation mechanisms to prevent crafted input attacks
Conduct security audits to identify and address vulnerabilities
Educate developers on secure coding practices

Patching and Updates

Apply patches provided by CHICKEN Scheme to address the vulnerability