CVE-2018-5178

Name: CVE-2018-5178
Creator: NVD / NIST
Published: 2018-06-11T21:29:16.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 5.06%

Last modified Jun 17, 2026

CVE-2018-5178 is a vulnerability of currently unknown severity. A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data. This vulnerability requires the use of a malicious or vulnerable legacy extension in order to occur. EPSS estimates a 5.06% chance of exploitation in the next 30 days.

Description

A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data. This vulnerability requires the use of a malicious or vulnerable legacy extension in order to occur. This vulnerability affects Thunderbird ESR < 52.8, Thunderbird < 52.8, and Firefox ESR < 52.8.

Metrics

EPSS Probability

5.06%

91.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Debian	Debian Linux	7.0
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Mozilla	Firefox	< 52.8.0
Mozilla	Thunderbird	< 52.8.0
Mozilla	Thunderbird Esr	< 52.8.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10
Canonical	Ubuntu Linux	18.04
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Server Aus	7.6
Redhat	Enterprise Linux Server Eus	7.5
Redhat	Enterprise Linux Server Eus	7.6
Redhat	Enterprise Linux Server Tus	7.6
Redhat	Enterprise Linux Workstation	6.0
Redhat	Enterprise Linux Workstation	7.0

References

http://www.securityfocus.com/bid/104138Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040898Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:1414Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1415Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1725Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1726Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1443891Issue Tracking, Permissions Required, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/05/msg00007.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/05/msg00013.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201810-01Third Party Advisory
https://security.gentoo.org/glsa/201811-13Third Party Advisory
https://usn.ubuntu.com/3660-1/Third Party Advisory
https://www.debian.org/security/2018/dsa-4199Third Party Advisory
https://www.debian.org/security/2018/dsa-4209Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-12/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-13/Vendor Advisory
http://www.securityfocus.com/bid/104138Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040898Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:1414Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1415Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1725Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1726Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1443891Issue Tracking, Permissions Required, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/05/msg00007.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/05/msg00013.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201810-01Third Party Advisory
https://security.gentoo.org/glsa/201811-13Third Party Advisory
https://usn.ubuntu.com/3660-1/Third Party Advisory
https://www.debian.org/security/2018/dsa-4199Third Party Advisory
https://www.debian.org/security/2018/dsa-4209Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-12/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-13/Vendor Advisory

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5178?

How severe is CVE-2018-5178?

Severity scoring for CVE-2018-5178 is pending analysis. The EPSS model estimates a 5.06% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5178?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-5178?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST