Vulnerability identifier: #VU4345

Vulnerability risk: High

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:F/RL:O/RC:C]

CVE-ID: CVE-2014-0266

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system
Microsoft XML Core Services
Client/Desktop applications / Other client software

Vendor: Microsoft

Description
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to improper enforcement of cross-domain policies. A remote attacker can create a specially crafted Web page, trick the victim into visiting it using Internet Explorer, bypass cross-domain security restrictions and read local files or content from web domains the victim is authenticated with.

Successful exploitation of the vulnerability results in information disclosure on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Windows: 7, 8, XP, Vista

Windows Server: 2003 - 2012

Microsoft XML Core Services: 3.0

---

External links
http://technet.microsoft.com/en-us/library/security/ms14-005

---

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?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.