#VU10188 Information disclosure in Mozilla Firefox - CVE-2018-5119

Vulnerability identifier: #VU10188

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5119

CWE-ID: CWE-200

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 obtain potentially sensitive information on the target system.

The weakness exists due to the displaying of cross-origin content when CORS headers are set to prohibit the loading of cross-origin content by a site. A remote attacker can bypass cross-origin content restrictions in Reader view and gain access to content that should be restricted in reader view.

Mitigation
Update to version 58.0.

Vulnerable software versions

Mozilla Firefox: 57.0 - 57.0.4

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2018-02/

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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.