Is CVE-2018-12393 in the CISA KEV catalog?

No. CVE-2018-12393 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-12393?

CVE-2018-12393 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-12393?

CVE-2018-12393 has an EPSS score of 3.92% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-12393?

Upgrade firefox on debian unstable to 63.0-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2018-12393

HIGHEPSS 89th pctl

7.5

CVSS v3

NVD

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.

CWE-190Integer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

firefoxDebian

Fixed in:63.0-1CVE-2018-12393

firefoxUbuntu

Fixed in:63.0+build2-0ubuntu0.14.04.2USN-3801-1

Fixed in:63.0+build2-0ubuntu0.16.04.2USN-3801-1

Fixed in:63.0+build2-0ubuntu0.18.04.2USN-3801-1

thunderbirdUbuntu

Fixed in:1:60.4.0+build2-0ubuntu0.14.04.1USN-3868-1

Fixed in:1:60.4.0+build2-0ubuntu0.16.04.1USN-3868-1

Fixed in:1:60.4.0+build2-0ubuntu0.18.04.1USN-3868-1

DeveloperEditionWindows application

Affected:63.0Fixed in:63.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:63.0Fixed in:63.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:60.3Fixed in:60.3Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:60.3Fixed in:60.3Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

3.92%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Vendor Advisory4

Third-Party Advisory15

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	90%	-	-
CVE-2017-3599	High	7.5	90%	-	Fix
CVE-2023-21716	Critical	9.8	82%	-	Fix

Embed a live status badge for CVE-2018-12393

Markdown

[![CVE-2018-12393](https://tridentstack.com/cve/badge/CVE-2018-12393.svg)](https://tridentstack.com/cve/CVE-2018-12393)

HTML

<a href="https://tridentstack.com/cve/CVE-2018-12393"><img src="https://tridentstack.com/cve/badge/CVE-2018-12393.svg" alt="CVE-2018-12393"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.