Zero-day vulnerability in Windows

Privilege escalation
CVE-2014-1807

Vulnerability details

Advisory: SB2014051301 - Privilege escalation in Microsoft Windows

Vulnerable component: Windows

CVE-ID: CVE-2014-1807

CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

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

Description:

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

The weakness exists due to improper use of the ShellExecute API function. A local attacker can run a specially crafted application within the context of the Local System account and gain elevated privileges.

Successful exploitation of the vulnerability results in privilege escalation on the vulnerable system.

Note: the vulnerability was being actively exploited.

External links:

https://technet.microsoft.com/en-us/library/security/ms14-027.aspx
https://www.l3pdu.com/2014/05/microsoft-security-bulletins-for-may-2014/
https://www.symantec.com/connect/blogs/microsoft-patch-tuesday-may-2014

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.