#VU17641 Input validation error in Microsoft products - CVE-2019-0540

Vulnerability identifier: #VU17641

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-0540

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Word
Client/Desktop applications / Office applications
Microsoft Excel
Client/Desktop applications / Office applications
Microsoft Office Compatibility Pack
Client/Desktop applications / Office applications
Microsoft PowerPoint
Client/Desktop applications / Office applications

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to perform a phishing attack.

The vulnerability exists due to insufficient validation of URLs when processing Microsoft Office files. A remote attacker can create a specially crafted file, trick the victim into opening it and entering credentials.

Successful exploitation of the vulnerability may allow an attacker to perform a phishing attack and gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 365 ProPlus, 2010 Service Pack 2, 2013 RT - 2013, 2016, 2019

Microsoft Word: Viewer

Microsoft Excel: Viewer

Microsoft Office Compatibility Pack: Service Pack 3

Microsoft PowerPoint: Viewer

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0540

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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.