CVE-2021-33479 : Exploit Details and Defense Strategies

A stack-based buffer overflow vulnerability was discovered in gocr through version 0.53-20200802 in measure_pitch() in pgm2asc.c.

Understanding CVE-2021-33479

This CVE identifies a stack-based buffer overflow vulnerability in the gocr software, affecting version 0.53-20200802.

What is CVE-2021-33479?

The CVE-2021-33479 vulnerability is a stack-based buffer overflow issue present in the measure_pitch() function in pgm2asc.c in gocr version 0.53-20200802.

The Impact of CVE-2021-33479

Exploitation of this vulnerability could allow a remote attacker to execute arbitrary code or trigger a denial of service (DoS) condition on the affected system.

Technical Details of CVE-2021-33479

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability is due to insufficient validation of user-supplied input in the measure_pitch() function, leading to a stack-based buffer overflow.

Affected Systems and Versions

The vulnerability affects gocr version 0.53-20200802.

Exploitation Mechanism

An attacker can exploit this vulnerability by crafting a malicious input and sending it to the vulnerable gocr software, leading to the execution of arbitrary code or a DoS condition.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-33479, users and administrators can take the following steps:

Immediate Steps to Take

Update to the latest version of gocr that contains a patch for the vulnerability.
Apply appropriate security controls to restrict access to vulnerable systems.

Long-Term Security Practices

Regularly monitor for security advisories related to gocr and other software components.
Conduct security training to raise awareness about safe coding practices and vulnerability management.

Patching and Updates

Vendor-supplied patches should be promptly applied to address the CVE-2021-33479 vulnerability.