CVE-2023-4255

Summary

CVE-2023-4255 is a newly discovered vulnerability in the W3M application's etc.c file. The issue lies in the checkType() function's backspace handling, which can be exploited by supplying a maliciously crafted HTML file to the w3m binary. This out-of-bounds write vulnerability can cause the application to crash, resulting in a denial of service condition. Successful exploitation may not lead to code execution but can significantly impact system availability. Users are advised to update their W3M software to mitigate this risk.

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