The function in charge to check whether the user is...

Vulnerability Description

The function in charge to check whether the user is already logged in init.php in Interspire Email Marketer (IEM) prior to 6.1.6 allows remote attackers to bypass authentication and obtain administrative access by using the IEM_CookieLogin cookie with a specially crafted value.

References

• https://www.exploit-db.com/exploits/44513/
• http://seclists.org/fulldisclosure/2017/Oct/39
• https://security.infoteam.ch/en/blog/posts/narrative-of-an-incident-response-from-compromise-to-the-publication-of-the-weakness.html