CVE-2018-5144
An integer overflow can occur during conversion of text to some Unicode character sets due to an unchecked length parameter.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An integer overflow can occur during conversion of text to some Unicode character sets due to an unchecked length parameter. This vulnerability affects Firefox ESR < 52.7 and Thunderbird < 52.7.
- CVSS 3.0
- 7.3 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 3.20% probability · 88th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation · debian/debian linux · canonical/ubuntu linux · mozilla/firefox · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 3.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/103384Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040514Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0526Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0527Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0647Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0648Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1440926Issue Tracking, Permissions Required
- https://lists.debian.org/debian-lts-announce/2018/03/msg00010.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00029.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/3545-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4139Third Party Advisory
- https://www.debian.org/security/2018/dsa-4155Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-07/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-09/Vendor Advisory
- http://www.securityfocus.com/bid/103384Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040514Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0526Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0527Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0647Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0648Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1440926Issue Tracking, Permissions Required
- https://lists.debian.org/debian-lts-announce/2018/03/msg00010.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00029.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/3545-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4139Third Party Advisory
- https://www.debian.org/security/2018/dsa-4155Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.