Advisory Details

March 10th, 2015

Microsoft Windows NtUserfnINSTRINGNULL Information Leak Vulnerability

CVE ID	CVE-2015-0077
CVSS SCORE	2.1, AV:L/AC:L/Au:N/C:P/I:N/A:N
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows
VULNERABILITY DETAILS	This vulnerability allows local attackers to leak sensitive information on vulnerable installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of NtUserfnINSTRINGNULL function. The issue lies in the failure to sanitize a buffer before calling a userland function resulting in the leak of a kernel address. An attacker can leverage this in concert with another vulnerability to achieve code execution at SYSTEM.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/library/security/MS15-023
DISCLOSURE TIMELINE	2014-12-04 - Vulnerability reported to vendor 2015-03-10 - Coordinated public release of advisory
CREDIT	WanderingGlitch of HP's Zero Day Initiative

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