CVE-2023-46246 Explained : Impact and Mitigation

A detailed overview of the Integer Overflow vulnerability in Vim's ':history' command.

Understanding CVE-2023-46246

This CVE addresses an Integer Overflow vulnerability in the ':history' command of Vim, a popular UNIX editor.

What is CVE-2023-46246?

Vim, an improved version of Vi editor, is affected by an Integer Overflow vulnerability in the ':history' command. This vulnerability could lead to a use-after-free condition.

The Impact of CVE-2023-46246

The impact of this vulnerability is considered medium with a CVSS base score of 4.0. An attacker could exploit this issue to potentially execute arbitrary code or disrupt the affected system.

Technical Details of CVE-2023-46246

In this section, we delve into the specific technical details of the CVE.

Vulnerability Description

The vulnerability involves a heap-use-after-free scenario in memory allocated within the 'ga_grow_inner' function in 'src/alloc.c' file of Vim. This allocated memory is later freed and reused, leading to an Integer Overflow when an argument provided to the ':history' command exceeds the accepted value.

Affected Systems and Versions

Vim versions up to and including 9.0.2067 are impacted by this vulnerability.

Exploitation Mechanism

By providing a crafted argument to the ':history' command, an attacker may trigger an Integer Overflow and potentially exploit the subsequent use-after-free condition.

Mitigation and Prevention

Explore the steps to mitigate and prevent exploitation of CVE-2023-46246.

Immediate Steps to Take

Users are advised to update Vim to version 9.0.2068 or later to eliminate the Integer Overflow vulnerability in the ':history' command.

Long-Term Security Practices

Implement secure coding practices, regularly update software, and maintain an active vulnerability management program to enhance system security.

Patching and Updates

Stay informed about security patches and updates released by Vim to ensure protection against known vulnerabilities.