Zero-day vulnerability in Windows

Memory corruption
CVE-2015-6175

Vulnerability details

Advisory: SB2015120801 - Multiple vulnerabilities in Microsoft Windows

Vulnerable component: Windows

CVE-ID: CVE-2015-6175

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

CWE-ID: CWE-119 - Memory corruption

Description:

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

The vulnerability exists due to boundary error when handling of objects in kernel memory. A local attacker can execute a specially crafted program, trigger memory corruption and gain SYSTEM privileges.

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

Note: the vulnerability was being actively exploited.

External links:

https://www2.trustwave.com/rs/815-RFM-693/images/2016%20Trustwave%20Global%20Security%20Report.pdf
https://technet.microsoft.com/library/security/ms15-135
https://www.symantec.com/security_response/vulnerability.jsp?bid=78514
http://www.securityweek.com/microsoft-patches-windows-office-flaws-exploited-wild

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.