CVE-2018-5178

high-risk
Published 2018-06-11

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.

Do I need to act?

!
18.2% chance of exploitation in next 30 days
EPSS score — higher than 82% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.1/10 High
NETWORK / HIGH complexity

Affected Products (20)

Affected Vendors

Debian Redhat Mozilla Canonical

References (32)

Third Party Advisory http://www.securityfocus.com/bid/104138
Third Party Advisory http://www.securitytracker.com/id/1040898
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1414
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1415
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1725
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1726
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1443891
Mailing List https://lists.debian.org/debian-lts-announce/2018/05/msg00007.html
Mailing List https://lists.debian.org/debian-lts-announce/2018/05/msg00013.html
Third Party Advisory https://security.gentoo.org/glsa/201810-01
Third Party Advisory https://security.gentoo.org/glsa/201811-13
Third Party Advisory https://usn.ubuntu.com/3660-1/
Third Party Advisory https://www.debian.org/security/2018/dsa-4199
Third Party Advisory https://www.debian.org/security/2018/dsa-4209
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-12/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-13/
Third Party Advisory http://www.securityfocus.com/bid/104138
Third Party Advisory http://www.securitytracker.com/id/1040898
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1414
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1415
and 12 more references
57
/ 100
high-risk
Severity 24/34 · High
Exploitability 13/34 · Low
Exposure 20/34 · Moderate