Remote Code Execution Vulnerability in Pycel by Stephen Rauch

CVE-2024-53924

What is CVE-2024-53924?

CVE-2024-53924 is a remote code execution vulnerability found in Pycel, a Python library designed to evaluate Excel-like formulas. This vulnerability allows attackers to execute arbitrary code on systems utilizing untrusted spreadsheets by crafting specific formulas that exploit the library's functionality. Organizations using Pycel could face severe consequences if they process unverified spreadsheet data, as successful exploitation could lead to unauthorized access and control over their systems.

Technical Details

The vulnerability exists in versions of Pycel up to 1.0b30, where a crafted cell formula can initiate code execution. For instance, a formula structured like =IF(A1=200, eval("__import__('os').system( substring...")) can be used to run commands on the underlying operating system. This exploitation vector is particularly dangerous, as it relies on Pycel's processing of untrusted spreadsheet content, which may be prevalent in various operational environments.

Potential Impact of CVE-2024-53924

1. Unauthorized Code Execution: The primary risk is the ability for attackers to execute arbitrary commands on affected systems, potentially leading to complete system compromise and data exposure.

2. Data Breach Potential: With remote code execution capabilities, an attacker could access sensitive organizational data, leading to significant financial and reputational damage as a result of data breaches.

3. Spread of Malware: Exploiting this vulnerability could enable attackers to deploy malware throughout an organization’s network, facilitating further attacks, data theft, or ransomware deployment, exacerbating the threat landscape.

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