"A remote code execution vulnerability has been reported in Microsoft Windows Notepad. The vulnerability is due to improper validation of links in Markdown files. A remote attacker could exploit this vulnerability by enticing the victim to download and interact with a malicious file. Successful exploitation of this vulnerability could result in the execution of arbitrary commands in the security context of the victim's account."
"Markdown is a lightweight markup language that allows users to create formatted text using a simple syntax. It is widely used for writing documents, blog posts, and README files. It supports a wide range of formatting options, including (but not limited to) headers, styled text, numbered and bulleted lists, and links. Markdown supports two main link formats: standard and inline. The standard link format is:"
Microsoft Windows Notepad contains a remote code execution vulnerability caused by improper validation of links in Markdown files. Modern Notepad supports Markdown rendering and tokenizes files that require special rendering. Markdown links can appear in standard [link-name](link/path) or inline [link/path](link/path) formats, and rendered links may hide actual targets behind displayed link text. A remote attacker can craft a malicious Markdown file and entice a user to download and open it in Notepad. Successful exploitation can cause execution of arbitrary commands under the victim's account privileges. Proper link validation and safer handling of tokenized input are required to prevent exploitation.
Read at Zero Day Initiative
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