CVE-2020-23706 Explained : Impact and Mitigation

A heap-based buffer overflow vulnerability in the function ok_jpg_decode_block_subsequent_scan() ok_jpg.c:1102 of ok-file-formats through 2020-06-26 allows attackers to cause a Denial of Service (DOS) via a crafted jpeg file.

Understanding CVE-2020-23706

This CVE involves a specific vulnerability in the ok-file-formats library that can be exploited to trigger a Denial of Service attack.

What is CVE-2020-23706?

The vulnerability lies in a heap-based buffer overflow within the ok_jpg_decode_block_subsequent_scan() function of ok-file-formats, potentially leading to a DOS condition when processing malicious jpeg files.

The Impact of CVE-2020-23706

The exploitation of this vulnerability can result in a Denial of Service (DOS) attack, causing affected systems to become unresponsive or crash.

Technical Details of CVE-2020-23706

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability is a heap-based buffer overflow in the ok_jpg_decode_block_subsequent_scan() function of ok-file-formats, allowing attackers to disrupt system availability by exploiting crafted jpeg files.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions of ok-file-formats through 2020-06-26

Exploitation Mechanism

The vulnerability can be exploited by manipulating specific components within a jpeg file, triggering the buffer overflow in the ok-file-formats library.

Mitigation and Prevention

Protecting systems from CVE-2020-23706 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply security patches or updates provided by the vendor to mitigate the vulnerability.
Avoid opening or processing untrusted jpeg files from unknown sources.

Long-Term Security Practices

Regularly update software and libraries to ensure the latest security fixes are in place.
Implement network and file scanning mechanisms to detect and block potentially malicious files.

Patching and Updates

Stay informed about security advisories related to ok-file-formats and promptly apply any patches released by the vendor to address the vulnerability.