CVE-2020-11958 : Security Advisory and Response

re2c 1.3 has a heap-based buffer overflow in Scanner::fill in parse/scanner.cc via a long lexeme.

Understanding CVE-2020-11958

re2c 1.3 has a critical heap-based buffer overflow vulnerability that can be exploited through a long lexeme in Scanner::fill in parse/scanner.cc.

What is CVE-2020-11958?

This CVE refers to a specific vulnerability in re2c 1.3 that allows for a heap-based buffer overflow attack.

The Impact of CVE-2020-11958

The vulnerability can be exploited by an attacker to execute arbitrary code or crash the application, potentially leading to a denial of service (DoS) condition.

Technical Details of CVE-2020-11958

re2c 1.3 vulnerability details and affected systems.

Vulnerability Description

The vulnerability exists in the Scanner::fill function in parse/scanner.cc due to improper handling of long lexemes, leading to a heap-based buffer overflow.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: 1.3

Exploitation Mechanism

The vulnerability can be exploited by crafting a specially designed input that triggers the overflow, potentially allowing an attacker to execute malicious code.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2020-11958.

Immediate Steps to Take

Apply vendor patches or updates as soon as they are available.
Consider implementing input validation mechanisms to prevent buffer overflows.
Monitor security advisories for any new information or patches related to this vulnerability.

Long-Term Security Practices

Regularly update software and systems to the latest versions.
Conduct security assessments and code reviews to identify and address potential vulnerabilities.
Educate developers on secure coding practices to prevent buffer overflow vulnerabilities.

Patching and Updates

Check for patches and updates from the re2c project or relevant vendors to address the heap-based buffer overflow vulnerability.