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MAY 2015

Bulletin ID

Bulletin Title and Executive Summary

Maximum Severity Rating
and Vulnerability Impact

MS15-043

Cumulative Security Update for Internet Explorer (3049563) 
This security update resolves vulnerabilities in Internet Explorer. The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

Critical 
Remote Code Execution

MS15-044

Vulnerabilities in Microsoft Font Drivers Could Allow Remote Code Execution (3057110) 
This security update resolves vulnerabilities in Microsoft Windows, Microsoft .NET Framework, Microsoft Office, Microsoft Lync, and Microsoft Silverlight. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted document or visits an untrusted webpage that contains embedded TrueType fonts.

Critical 
Remote Code Execution

MS15-045

Vulnerability in Windows Journal Could Allow Remote Code Execution (3046002) 
This security update resolves vulnerabilities in Microsoft Windows. The vulnerabilities could allow remote code execution if a user opens a specially crafted Journal file. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

Critical 
Remote Code Execution

MS15-046

Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (3057181) 
This security update resolves vulnerabilities in Microsoft Office. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted Microsoft Office file. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

Important 
Remote Code Execution

MS15-047

Vulnerabilities in Microsoft SharePoint Server Could Allow Remote Code Execution (3058083) 
This security update resolves vulnerabilities in Microsoft Office server software. The vulnerabilities could allow remote code execution if an authenticated attacker sends specially crafted page content to a SharePoint server. An attacker who successfully exploited these vulnerabilities could run arbitrary code in the security context of the W3WP service account on the target SharePoint site.

Important 
Remote Code Execution

MS15-048

Vulnerabilities in .NET Framework Could Allow Elevation of Privilege (3057134) 
This security update resolves vulnerabilities in Microsoft .NET Framework. The most severe of the vulnerabilities could allow elevation of privilege if a user installs a specially crafted partial trust application.

Important 
Elevation of Privilege

MS15-049

Vulnerability in Silverlight Could Allow Elevation of Privilege (3058985) 
This security update resolves a vulnerability in Microsoft Silverlight. The vulnerability could allow elevation of privilege if a specially crafted Silverlight application is run on an affected system. To exploit the vulnerability an attacker would first have to log on to the system or convince a logged on user to execute the specially crafted application.

Important 
Elevation of Privilege

MS15-050

Vulnerability in Service Control Manager Could Allow Elevation of Privilege (3055642) 
This security update resolves a vulnerability in Windows Service Control Manager (SCM), which is caused when SCM improperly verifies impersonation levels. The vulnerability could allow elevation of privilege if an attacker first logs on to the system and then runs a specially crafted application designed to increase privileges.

Important 
Elevation of Privilege

MS15-051

Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of Privilege (3057191) 
This security update resolves vulnerabilities in Microsoft Windows. The more severe of these vulnerabilities could allow elevation of privilege if an attacker logs on locally and runs arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker must have valid logon credentials and be able to log on locally to exploit this vulnerability. The vulnerability cannot be exploited remotely or by anonymous users.

Important 
Elevation of Privilege

MS15-052

Vulnerability in Windows Kernel Could Allow Security Feature Bypass (3050514) 
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow security feature bypass if an attacker logs on to an affected system and runs a specially crafted application.

Important 
Security Feature Bypass

MS15-053

Vulnerabilities in JScript and VBScript Scripting Engines Could Allow Security Feature Bypass (3057263) 
This security update resolves ASLR security feature bypasses in the JScript and VBScript scripting engines in Microsoft Windows. An attacker could use one of these ASLR bypasses in conjunction with another vulnerability, such as a remote code execution vulnerability, to more reliably run arbitrary code on a target system.

Important 
Security Feature Bypass

MS15-054

Vulnerability in Microsoft Management Console File Format Could Allow Denial of Service (3051768) 
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow denial of service if a remote, unauthenticated attacker convinces a user to open a share containing a specially crafted .msc file. However, an attacker would have no way of forcing a user to visit the share or view the file.

Important 
Denial of Service

MS15-055

Vulnerability in Schannel Could Allow Information Disclosure (3061518) 
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow information disclosure when Secure Channel (Schannel) allows the use of a weak Diffie-Hellman ephemeral (DHE) key length of 512 bits in an encrypted TLS session. Allowing 512-bit DHE keys makes DHE key exchanges weak and vulnerable to various attacks. A server needs to support 512-bit DHE key lengths for an attack to be successful; the minimum allowable DHE key length in default configurations of Windows servers is 1024 bits.

Important 
Information Disclosure