CVE-2020-21687 : Vulnerability Insights and Analysis

CVE-2020-21687 pertains to a Buffer Overflow vulnerability in the scan function in stdscan.c in nasm 2.15rc0, enabling remote attackers to trigger a denial of service through a manipulated asm file.

Understanding CVE-2020-21687

This CVE identifies a specific vulnerability in the nasm software version 2.15rc0.

What is CVE-2020-21687?

The CVE-2020-21687 vulnerability involves a Buffer Overflow issue in the scan function within the stdscan.c file of nasm 2.15rc0, which can be exploited by malicious actors to cause a denial of service by utilizing a specially crafted asm file.

The Impact of CVE-2020-21687

The vulnerability poses a risk of remote attackers being able to disrupt the normal operation of the nasm software, potentially leading to service unavailability or crashes.

Technical Details of CVE-2020-21687

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from a Buffer Overflow flaw in the scan function of stdscan.c in nasm 2.15rc0, allowing attackers to execute a denial of service attack.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by creating a specifically crafted asm file to trigger the Buffer Overflow in the scan function of nasm 2.15rc0.

Mitigation and Prevention

To address CVE-2020-21687, follow these mitigation strategies.

Immediate Steps to Take

Apply the latest patches or updates provided by the software vendor.
Implement network security measures to restrict access to vulnerable components.
Monitor network traffic for any suspicious activity that may indicate an ongoing attack.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Educate users and administrators about safe coding practices and the importance of software security.

Patching and Updates

Stay informed about security advisories related to nasm software and promptly apply patches released by the vendor to mitigate the vulnerability.