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vulnerability CVE-2010-2568

Windows: code execution via LNK

Synthesis of the vulnerability

An attacker can invite the victim to display a directory containing a malicious link, in order to execute code on his computer.
Vulnerable systems: Windows 2000, Windows 2003, Windows 2008 R0, Windows 2008 R2, Windows 7, Windows Vista, Windows XP.
Severity of this threat: 3/4.
Consequences of a hack: user access/rights.
Pirate's origin: document.
Creation date: 16/07/2010.
Références of this weakness: 2286198, BID-41732, CERTA-2010-AVI-353, CVE-2010-2568, MS10-046, VIGILANCE-VUL-9770, VU#940193.

Description of the vulnerability

A user can create a Windows link, which is a file with the ".LNK" extension pointing to another file.

However, an attacker can create a special LNK file pointing to code located inside the LNK file (a DLL library with a main code which is run). This code is executed when the directory containing the link is displayed. The victim does not have to click on the link.

In order to exploit this vulnerability, the attacker can place the malicious link on a USB drive, a cdrom, a remote share, a local directory or a WebDAV access. The link can also be located inside a malicious document (such as an Office document). MS-DOS programs also use links with the ".PIF" extension.

An attacker can therefore invite the victim to display a directory containing a malicious link, in order to execute code on his computer.
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