CVE-2021-45423 : Security Advisory and Response

A Buffer Overflow vulnerability exists in Pev 0.81 via the pe_exports function from exports.c, potentially leading to arbitrary code execution.

Understanding CVE-2021-45423

What is CVE-2021-45423?

CVE-2021-45423 is a Buffer Overflow vulnerability found in Pev 0.81 through the pe_exports function from exports.c. The issue arises from dynamically allocating the array offsets_to_Names on the stack using exp->NumberOfFunctions as its size, while the loop iterates using exp->NumberOfNames, assuming exp->NumberOfFunctions is greater than ordinal.

The Impact of CVE-2021-45423

This vulnerability can result in arbitrary code execution, posing a significant risk to the security of systems running Pev 0.81.

Technical Details of CVE-2021-45423

Vulnerability Description

The vulnerability in Pev 0.81 allows for a Buffer Overflow due to improper handling of array allocation sizes, potentially leading to unauthorized code execution.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions Affected: n/a

Exploitation Mechanism

The exploitation of this vulnerability involves manipulating the allocated array on the stack, enabling an attacker to execute arbitrary code on the target system.

Mitigation and Prevention

Immediate Steps to Take

Update: Consider updating to a patched version of Pev that addresses the Buffer Overflow issue.
Restrict Access: Limit access to vulnerable systems to trusted entities only.

Long-Term Security Practices

Security Audits: Conduct regular security audits to detect and address vulnerabilities promptly.
Secure Coding Practices: Implement secure coding practices to minimize the risk of similar vulnerabilities in the future.

Patching and Updates

Ensure timely application of security patches and updates to mitigate the risk posed by CVE-2021-45423.