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CVE-2016-3312: Microsoft Windows 10: Information disclosure

CVE-2016-3312 is rated critical with a CVSS v3.0 base score of 9.1 and affects Microsoft Windows 10. Per its scoring, it can be exploited over the network, without authentication, without any user interaction.

Vulnerability description

ActiveSyncProvider in Microsoft Windows 10 Gold and 1511 allows attackers to discover credentials by leveraging failure of Universal Outlook to obtain a secure connection, aka "Universal Outlook Information Disclosure Vulnerability."

Severity breakdown

CVSS v3.0 9.1: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

• Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
• Attack complexity: Low. No special conditions; the attack can be repeated reliably.
• Privileges required: None. No account or prior access is needed.
• User interaction: None. No action from any user is needed.
• Scope: Unchanged. Impact stays within the vulnerable component.
• Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
• Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
• Availability impact: None. No effect on availability.

Underlying weakness

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Affected products

• Microsoft Windows 10: all versions listed by NVD; 1511

References

• http://www.securityfocus.com/bid/92307
• http://www.securitytracker.com/id/1036577
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-103