Zero-day vulnerability in Windows

Buffer overflow
CVE-2006-3439

Vulnerability details

Advisory: SB2006080802 - Buffer overflow in Microsoft Windows Server service

Vulnerable component: Windows

CVE-ID: CVE-2006-3439

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

CWE-ID: CWE-119 - Memory corruption

Description:

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

The vulnerability exists due to boundary error in Microsoft Windows Server Service. A remote attacker can send a specially crafted packet to port 139/TCP or 445/TCP, trigger boundary error and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in compromise of vulnerable system.

Note: this vulnerability is being actively exploited.

Public Exploits:

- Microsoft Server Service - NetpwPathCanonicalize Overflow (MS06-040) (Metasploit) [Exploit-DB]

- Microsoft Windows Server 2003 - NetpIsRemote() Remote Overflow (MS06-040) (Metasploit) [Exploit-DB]

- Microsoft Windows - NetpIsRemote() Remote Overflow (MS06-040) (2) [Exploit-DB]

- Microsoft Windows - CanonicalizePathName() Remote Exploit (MS06-040) [Exploit-DB]

- Microsoft Windows - NetpIsRemote() Remote Overflow (MS06-040) (Metasploit) [Exploit-DB]

External links:

https://technet.microsoft.com/en-us/library/security/ms06-040.aspx
https://www.symantec.com/security_response/attacksignatures/detail.jsp?asid=21702

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.