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Privilege escalation in Microsoft Windows



Published: 2014-11-11 | Updated: 2017-01-20
Severity Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2014-4077
CWE ID CWE-264
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
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Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Advisory

This security advisory describes one critical risk vulnerability.

1) Privilege escalation

Severity: Critical

CVSSv3: 7.9 [CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2014-4077

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a remote authenticated attacker to obtain elevated privileges on the target system.

The weakness exists due to improper access control in Microsoft implementation of Input Method Editor (IME) for Japanese language. A remote attacker can create a specially crafted file designed to invoke a vulnerable sandboxed application, trick the victim into opening it, gain elevated privileges and execute arbitrary code with privileges of the current user.

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

Note: the vulnerability was being actively exploited.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 7, Vista

Windows Server: 2003, 2008

CPE External links

https://technet.microsoft.com/en-us/library/security/ms14-078

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user 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.