Severity Rating: Important
Revision Note: V1.0 (March 10, 2015): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Exchange Server. The most severe of the vulnerabilities could allow elevation of privilege if a user clicks a specially crafted URL that takes them to a targeted Outlook Web App site. An attacker would have no way to force users to visit a specially crafted website. Instead, an attacker would have to convince them to visit the website, typically by getting them to click a link in an instant messenger or email message that takes them to the attacker’s website, and then convince them to click the specially crafted URL.

Severity Rating: Important
Revision Note: V1.0 (March 10, 2015): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows that facilitates exploitation of the publicly disclosed FREAK technique, an industry-wide issue that is not specific to Windows operating systems. The vulnerability could allow a man-in-the-middle (MiTM) attacker to force the downgrading of the key length of an RSA key to EXPORT-grade length in a TLS connection. Any Windows system using Schannel to connect to a remote TLS server with an exploitable cipher suite is affected.

Severity Rating: Important
Revision Note: V1.0 (March 10, 2015): Bulletin published.
Summary: This security update resolves four privately reported vulnerabilities in Microsoft Windows. The most severe of these vulnerabilities could allow security feature bypass if an attacker logs on to the system and runs a specially crafted application designed to increase privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full administrative rights.

Severity Rating: Critical
Revision Note: V1.0 (March 10, 2015): Bulletin published.
Summary: 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.

Severity Rating: Important
Revision Note: V1.0 (March 10, 2015): Bulletin published.
Summary: This security update resolves two privately reported vulnerabilities in Microsoft Windows. The vulnerabilities could allow elevation of privilege if an attacker logs on to an affected system and runs a specially crafted application. An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

Severity Rating: Critical
Revision Note: V1.0 (March 10, 2015): Bulletin published.
Summary: 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.

Severity Rating: Critical
Revision Note: V1.1 (March 10, 2015): Bulletin revised to better explain the attack vector for the DLL Planting Remote Code Execution Vulnerability (CVE-2015-0096).
Summary: This security update resolves two privately reported vulnerabilities in Microsoft Windows. The vulnerabilities could allow remote code execution if an attacker successfully convinces a user to browse to a specially crafted website, open a specially crafted file, or open a file in a working directory that contains a specially crafted DLL file.

Severity Rating: Critical
Revision Note: V1.0 (March 10, 2015): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted file or website. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited these vulnerabilities could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. 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.

Severity Rating: Important
Revision Note: V1.0 (March 10, 2015): Bulletin published.
Summary: This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow Security Feature Bypass if a user runs a specially crafted application that is designed to cause Task Scheduler to improperly validate impersonation-level security.

Severity Rating: Important
Revision Note: V1.1 (March 5, 2015): Advisory revised to clarify the reason why no workaround exists for systems running Windows Server 2003. See the Advisory FAQ for more information.
Summary: Microsoft is aware of a security feature bypass vulnerability in Secure Channel (Schannel) that affects all supported releases of Microsoft Windows. Our investigation of the vulnerability has verified that the vulnerability could allow an attacker to force the downgrading of the cipher suites used in an SSL/TLS connection on a Windows client system. The vulnerability facilitates exploitation of the publicly disclosed FREAK technique, which is an industry-wide issue that is not specific to Windows operating systems. When this security advisory was originally issued, Microsoft had not received any information to indicate that this issue had been publicly used to attack customers. Technologies and best practices that protect against man-in-the-middle (MiTM) attacks similarly mitigate the risks associated with the vulnerability.