Remote code execution in Microsoft Outlook

1) Security restrictions bypass

EUVDB-ID: #VU13320

Risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-8244

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to an error when processing email messages with specially crafted attachment headers. A remote attacker can send an email with hidden attachments that would be opened or executed once a victim clicks a link within the email.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Outlook: 2010 Service Pack 2 - 2016

Microsoft Office: 2016

CPE2.3

• cpe:2.3:a:microsoft:microsoft_outlook:2010_Service_Pack_2:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_outlook:2013_Service_Pack_1:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_outlook:2013_RT_Service_Pack_1:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_outlook:*:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_office:*:*:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8244

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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