SB2018021317 - Two vulnerabilities in Microsoft Outlook

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2018-0852)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error when attached files within the emails. A remote unauthenticated attacker can send an email, containing a specially crafted file, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Cross-site scripting (CVE-ID: CVE-2018-0850)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of emails. A remote attacker can trick the victim to connect to malicious SMB share and execute arbitrary HTML and script code within Microsoft Outlook context.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0852
• https://support.microsoft.com/en-us/help/830335/microsoft-update-and-windows-update-offer-updates-fo...
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0850