Same-origin policy bypass in Mozilla Firefox



Published: 2017-03-07
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-5407
CWE-ID CWE-346
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Mozilla Firefox
Client/Desktop applications / Web browsers

Vendor Mozilla

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Same-origin policy bypass

EUVDB-ID: #VU5927

Risk: Low

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

CVE-ID: CVE-2017-5407

CWE-ID: CWE-346 - Origin Validation Error

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass same-origin policy.

The vulnerability exists due to an error when parsing SVG filters that do not use the fixed point math implementation on a target iframe. Remote attacker can create a specially crafted Web page, trick the victim into visiting it and make a malicious page can extract pixel values from a targeted user.

Successful exploitation of the vulnerability may allow an attacker to extract history information and read text values across domains.

Mitigation

Update to Firefox 52.

Vulnerable software versions

Mozilla Firefox: 50.0 - 51.0.3

CPE2.3 External links

http://www.mozilla.org/en-US/security/advisories/mfsa2017-05/#CVE-2017-5400


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user 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.



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