#VU13492 Security restrictions bypass in Mozilla Firefox - CVE-2018-12370

Vulnerability identifier: #VU13492

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-12370

CWE-ID: CWE-264

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 bypass security restrictions on the target system.

The weakness exists due to in Reader View SameSite cookie protections are not checked on exiting. A remote attacker can trigger a payload when Reader View is exited if loaded by a malicious site while Reader mode is active, bypass CSRF protections and possibly conduct CSRF attack.

Mitigation
Update to version 61.0.

Vulnerable software versions

Mozilla Firefox: 60.0 - 60.0.2

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2018-15/

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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.