#VU5669 Security bypass in Windows and Windows Server - CVE-2015-2454

Vulnerability identifier: #VU5669

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-2454

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description
The vulnerabiity allows a local attacker to bypass security restrictions on the target system.

The weakness exists due to improper validation and enforcement of impersonation levels by Windows kernel-mode driver. A local attacker can create a specially crafted application, execute it on the system, bypass impersonation-level security and gain elevated privileges.

Successful exploitation of this vulnerability may result in privilege escalation on the vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Windows: Vista, RT, 7, 8 - 8.1, 10

Windows Server: 2008 R2 - 2008, 2012 R2 - 2012

---

External links
https://technet.microsoft.com/en-us/library/security/ms15-080.aspx

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.