#VU6344 Self-XSS in Mozilla Firefox - CVE-2017-5458

Vulnerability identifier: #VU6344

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-5458

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to perform a psoofing attack.

The vulnerability exists due to an insufficient sanitization of data sent as URL, when a javascript: URL is drag and dropped by a user into the addressbar, the URL will be processed and executed. A remote attacker can trick the victim into executing malicious JavaScript.

Mitigation
Update to Firefox 53.

Vulnerable software versions

Mozilla Firefox: 52 - 52.0.2

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2017-10/

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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.