CVE-2022-44313 : Security Advisory and Response

A heap buffer overflow vulnerability was discovered in PicoC Version 3.2.2, specifically in the ExpressionCoerceUnsignedInteger function in expression.c. This vulnerability occurs when called from ExpressionParseFunctionCall.

Understanding CVE-2022-44313

This section will provide insights into the impact, technical details, and mitigation strategies related to CVE-2022-44313.

What is CVE-2022-44313?

CVE-2022-44313 is a heap buffer overflow vulnerability found in PicoC Version 3.2.2, affecting the ExpressionCoerceUnsignedInteger function in expression.c when invoked by ExpressionParseFunctionCall.

The Impact of CVE-2022-44313

The heap buffer overflow vulnerability in PicoC Version 3.2.2 could potentially allow an attacker to execute arbitrary code or crash the application, leading to a denial of service condition.

Technical Details of CVE-2022-44313

Let's delve deeper into the technical aspects of CVE-2022-44313 to understand the vulnerability better.

Vulnerability Description

The vulnerability arises due to improper handling of memory operations in the ExpressionCoerceUnsignedInteger function, resulting in a buffer overflow condition.

Affected Systems and Versions

All instances of PicoC Version 3.2.2 are affected by this vulnerability when the vulnerable function is called from ExpressionParseFunctionCall.

Exploitation Mechanism

An attacker could exploit this vulnerability by crafting a malicious input that triggers an overflow of the heap buffer, potentially leading to the execution of arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2022-44313 involves taking immediate steps as well as implementing long-term security measures.

Immediate Steps to Take

Update PicoC to a patched version that addresses the heap buffer overflow vulnerability.
Restrict network access to vulnerable systems to mitigate potential exploitation.

Long-Term Security Practices

Regularly monitor security mailing lists for updates on vulnerabilities and patches.
Conduct routine security assessments to identify and remediate potential risks.

Patching and Updates

Ensure timely application of security patches and updates to eliminate known vulnerabilities and enhance system security.