CVE-2021-3377 Scanner

The npm package ansi_up is a converter that transforms ANSI escape codes into HTML. This package is commonly used for formatting and enhancing terminal output in web applications. It offers various features such as colorizing text, bold and italic fonts, and even the ability to create HTML hyperlinks through ANSI escape codes. 

CVE-2021-3377 is a cross-site scripting (XSS) vulnerability found in ansi_up version 4. Due to insufficient URL sanitization, a malicious user can inject script code into a hyperlink, which can later be executed in the victim's browser. This vulnerability can be exploited by an attacker to gain access to sensitive data, such as login credentials, and even take control of victim's sessions.

Exploiting this vulnerability can lead to various security issues, from stealing sensitive information to taking over an entire system. For example, if an attacker injected a malicious code into a hyperlink using ansi_up, and a user clicked on that hyperlink, the script code could be executed on the user's system, allowing the attacker to gain access to their login credentials and other sensitive information.

In conclusion, vulnerabilities such as CVE-2021-3377 can have severe consequences for digital assets. Luckily, there are tools available to help prevent such issues. s4e.io offers pro features that allow users to quickly and easily scan their digital assets for vulnerabilities. By using this platform, businesses and individuals can ensure their systems and data stay safe and secure.

REFERENCES

• https://doyensec.com/resources/Doyensec_Advisory_ansi_up4_XSS.pdf
• https://github.com/drudru/ansi_up/commit/c8c726ed1db979bae4f257b7fa41775155ba2e27