#VU1222 Heap-based buffer overflow in Microsoft Internet Explorer - CVE-2006-4777

Vulnerability identifier: #VU1222

Vulnerability risk: Critical

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2006-4777

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft Internet Explorer
Client/Desktop applications / Web browsers

Vendor: Microsoft

Description

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

The vulnerability exists due to heap-based buffer overflow within DirectAnimation Path ActiveX control (daxctle.ocx) when handling unexpected input. A remote attacker can create a specially crafted web page, trick the victim into opening it 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.

Mitigation
Install updates from vendor's website:

• Microsoft Internet Explorer 5.01 Service Pack 4 on Windows 2000 Service Pack 4 — Download the update
• Microsoft Internet Explorer 6 Service Pack 1 on Windows 2000 Service Pack 4 — Download the update
• Microsoft Internet Explorer 6 for Windows XP Service Pack 2 — Download the update
• Microsoft Internet Explorer 6 for Windows XP Professional x64 Edition — Download the update
• Microsoft Internet Explorer 6 for Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1 — Download the update
• Microsoft Internet Explorer 6 for Windows Server 2003 for Itanium-based Systems and Windows Server 2003 with SP1 for Itanium-based Systems — Download the update
• Microsoft Internet Explorer 6 for Windows Server 2003 x64 Edition — Download the update

Vulnerable software versions

Microsoft Internet Explorer: 5.01 - 6

---

External links
https://technet.microsoft.com/library/security/ms06-067
https://technet.microsoft.com/library/security/925444

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.