Vulnerability identifier: #VU9863

Vulnerability risk: Medium

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0803

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Edge
Client/Desktop applications / Web browsers

Vendor: Microsoft

Description
The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to improper enforcement of cross-domain policies, which could allow an attacker to access information from one domain and inject it into another domain. A remote attacker can create a specially crafted web page, trick the victim into opening it and replace contents in another user's tab.

Successful exploitation of the vulnerability may allow an attacker to steal victim's credentials to another website, perform phishing and drive-by download attacks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Edge:

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0803

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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.