SB2017101012 - Multiple vulnerabilities in Microsoft Outlook

Description

This security bulletin contains information about 2 vulnerabilities.

1) Security restrictions bypass (CVE-ID: CVE-2017-11774)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to an error when Microsoft Office improperly handles objects in memory. A remote attacker can provide a specially crafted document file, trick the victim into opening it and execute arbitrary commands.

2) Information disclosure (CVE-ID: CVE-2017-11776)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to an error when Microsoft Outlook fails to establish a secure connection. A remote attacker can obtain the email content of a user.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11774
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11776