A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.

No CVSS v4.0

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.24302.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Mozilla Thunderbird affected
Version Status Constraints
unspecified affected < 60.4
Mozilla Firefox ESR affected
Version Status Constraints
unspecified affected < 60.4
Mozilla Firefox affected
Version Status Constraints
unspecified affected < 64

Configuration 1 [-]

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Configuration 2 [-]

OR cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Configuration 3 [-]

OR cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

Configuration 4 [-]

OR cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
Package CPE Advisory Released Date
Red Hat Enterprise Linux 6
firefox-0:60.4.0-1.el6 cpe:/o:redhat:enterprise_linux:6 RHSA-2018:3831 2018-12-17T00:00:00Z
thunderbird-0:60.4.0-1.el6 cpe:/o:redhat:enterprise_linux:6 RHSA-2019:0159 2019-01-24T00:00:00Z
Red Hat Enterprise Linux 7
firefox-0:60.4.0-1.el7 cpe:/o:redhat:enterprise_linux:7 RHSA-2018:3833 2018-12-17T00:00:00Z
thunderbird-0:60.4.0-1.el7_6 cpe:/o:redhat:enterprise_linux:7 RHSA-2019:0160 2019-01-24T00:00:00Z

No data.

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Vendors Products
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Debian Subscribe
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Mozilla Subscribe
Firefox Subscribe
Thunderbird Subscribe
Redhat Subscribe
Enterprise Linux Subscribe
Enterprise Linux Desktop Subscribe
Enterprise Linux Server Subscribe
Enterprise Linux Server Aus Subscribe
Enterprise Linux Server Eus Subscribe
Enterprise Linux Server Tus Subscribe
Enterprise Linux Workstation Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-1605-1 firefox-esr security update
Debian DSA Debian DSA DSA-4354-1 firefox-esr security update
EUVD EUVD EUVD-2018-10218 A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.
Ubuntu USN Ubuntu USN USN-3844-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-3868-1 Thunderbird vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
http://www.securityfocus.com/bid/106168 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2018:3831 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2018:3833 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:0159 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2019:0160 cve-icon cve-icon
https://bugzilla.mozilla.org/show_bug.cgi?id=1504452 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2018/12/msg00002.html cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2018-18493 cve-icon
https://security.gentoo.org/glsa/201903-04 cve-icon cve-icon
https://usn.ubuntu.com/3844-1/ cve-icon cve-icon
https://usn.ubuntu.com/3868-1/ cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2018-18493 cve-icon
https://www.debian.org/security/2018/dsa-4354 cve-icon cve-icon
https://www.debian.org/security/2019/dsa-4362 cve-icon cve-icon
https://www.mozilla.org/en-US/security/advisories/mfsa2018-30/#CVE-2018-18493 cve-icon
https://www.mozilla.org/security/advisories/mfsa2018-29/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2018-30/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2018-31/ cve-icon cve-icon
History

Tue, 25 Nov 2025 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Vendors & Products Mozilla firefox Esr

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-05T11:08:21.887Z

Reserved: 2018-10-19T00:00:00.000Z

Link: CVE-2018-18493

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-02-28T18:29:01.507

Modified: 2025-11-25T17:50:16.803

Link: CVE-2018-18493

cve-icon Redhat

Severity : Important

Publid Date: 2018-12-11T00:00:00Z

Links: CVE-2018-18493 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses