Vulnerability identifier: #VU7053

Vulnerability risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-8504

CWE-ID: CWE-200

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 obtain potentially sensitive information on the target system.

The weakness exists due to incorrect handling of a filtered response type by Microsoft Edge Fetch API. A remote attacker can create a specially crafted website containing malicious content, trick the victim into viewing it and read the URL of a cross-origin request.

Successful exploitation of the vulnerability may result in information disclosure.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Microsoft Edge:

---

External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8504

---

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. However, proof of concept for this vulnerability is available.