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Remote code execution in Mozilla Firefox

Published: 2018-09-21 | Updated: 2018-09-24
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2018-12385
Exploitation vector Network
Public exploit N/A
Vulnerable software
Mozilla Firefox
Client/Desktop applications / Web browsers

Vendor Mozilla

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Input validation error

Severity: Medium

CVSSv3: 7.1 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2018-12385

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists within the TransportSecurityInfo function due to insufficient validation of data stored in the local cache in the user profile directory. A remote attacker with ability to write data into local cache (e.g. with combination of another vulnerability) can execute arbitrary code on the target system.


Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 62.0, 62.0.1

CPE External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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.