Information disclosure in Microsoft Edge

1) Origin validation error

EUVDB-ID: #VU28886

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 - Origin Validation Error

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:microsoft:edge:*:*:*:*:*:*:*:*

External links

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

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.

Is there known malware, which exploits this vulnerability?

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