#VU28886 Origin validation error in Microsoft Edge - CVE-2020-1242

Vulnerability identifier: #VU28886

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/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-2020-1242

CWE-ID: CWE-346

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 gain access to sensitive information.

The vulnerability exists in the way that Microsoft Edge handles cross-origin requests. A remote attacker can create a specially crafted web page, trick the victim into visiting it and determine origin of all opened web pages in the browser.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Edge: All versions

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1242

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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.