CVE-2023-51105 : What You Need to Know

A floating point exception (divide-by-zero) vulnerability was discovered in mupdf 1.23.4 in function bmp_decompress_rle4() of load-bmp.c.

Understanding CVE-2023-51105

This article provides insights into the CVE-2023-51105 vulnerability affecting mupdf 1.23.4.

What is CVE-2023-51105?

CVE-2023-51105 is a floating point exception (divide-by-zero) vulnerability found in mupdf 1.23.4's bmp_decompress_rle4() function of load-bmp.c.

The Impact of CVE-2023-51105

This vulnerability could potentially be exploited by attackers to cause a denial of service by triggering a divide-by-zero error in the specified function.

Technical Details of CVE-2023-51105

The technical details of CVE-2023-51105 are as follows:

Vulnerability Description

The vulnerability exists in the bmp_decompress_rle4() function of load-bmp.c in mupdf 1.23.4, leading to a floating point exception (divide-by-zero) issue.

Affected Systems and Versions

All versions of mupdf 1.23.4 are affected by this CVE (CVE-2023-51105).

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating BMP files to trigger the divide-by-zero error, potentially leading to a denial of service.

Mitigation and Prevention

Mitigating the risks associated with CVE-2023-51105 involves taking the following steps:

Immediate Steps to Take

Consider applying vendor patches or updates to mupdf to address the vulnerability.

Long-Term Security Practices

Regularly updating software and applications to patch known vulnerabilities.
Implementing proper input validation mechanisms to prevent exploitation of divide-by-zero errors.

Patching and Updates

Keep track of security advisories and update mechanisms provided by the software vendor to ensure timely patching of vulnerabilities.