Zero-day vulnerability in Microsoft IIS

Stack-based buffer overflow

The issue has been introduced in 06/02/1998. The weakness was publicly disclosed on August 31, 2009 by Kingcope. The vulnerability was handled as a non-public zero-day exploit.

Vulnerability details

Advisory: SB2009083101 - Two vulnerabilities in Microsoft IIS FTP server

Vulnerable component: Microsoft IIS

CVE-ID: CVE-2009-3023

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C

CWE-ID: CWE-121 - Stack-based buffer overflow


The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.

The weakness exists due to stack-based buffer overflow in FTP server. A remote authenticated attacker can send a specially crafted FTP NLST command containing a wildcard that references a subdirectory, trigger memory corruption and execute arbitrary code on the system with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Public Exploits: