CVE-2018-12393
7.5 · HIGHOverview
CVE-2018-12393 is a high-severity vulnerability affecting mozilla firefox. It was published on February 28, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. *Note: 64-bit builds are not vulnerable to this issue.*. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.
Remediation
Check the references section for vendor advisories and patches from mozilla. Update firefox to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| mozilla | firefox | >= 0, < 63.0 | Affected |
| mozilla | firefox_esr | >= 0, < 60.3 | Affected |
| mozilla | thunderbird | >= 0, < 60.3 | Affected |
References
Frequently Asked Questions
What is CVE-2018-12393?
CVE-2018-12393 is a high-severity vulnerability affecting mozilla firefox. It was published on February 28, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).
How severe is CVE-2018-12393?
This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-12393?
Check the references section for vendor advisories and patches from mozilla. Update firefox to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-12393?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-12393 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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