#VU10549 Cross-site scripting in Microsoft Outlook and Microsoft Office - CVE-2018-0850

Vulnerability identifier: #VU10549

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-0850

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Outlook
Client/Desktop applications / Office applications
Microsoft Office
Client/Desktop applications / Office applications

Vendor: Microsoft

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Outlook: 2007, 2010 Service Pack 2, 2013 RT Service Pack 1, 2013 Service Pack 1, 2016

Microsoft Office: 2016

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0850

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.