critical
9.8
CWE
119
Advisory Published
Updated

CVE-2018-18493: Buffer Overflow

First published: Tue Dec 11 2018(Updated: )

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.

Credit: security@mozilla.org security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Thunderbird<60.4
60.4
Mozilla Firefox ESR<60.4
60.4
Mozilla Firefox<64
64
Mozilla Firefox<64.0
Mozilla Firefox ESR<60.4.0
Mozilla Thunderbird<60.4.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=18.10
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=7.6
Redhat Enterprise Linux Server Tus=7.6
Redhat Enterprise Linux Workstation=6.0
Redhat Enterprise Linux Workstation=7.0
ubuntu/firefox<64.0+
64.0+
ubuntu/firefox<64.0+
64.0+
ubuntu/firefox<64.0+
64.0+
ubuntu/firefox<64.0
64.0
ubuntu/firefox<64.0+
64.0+
ubuntu/thunderbird<1:60.4.0+
1:60.4.0+
ubuntu/thunderbird<1:60.4.0+
1:60.4.0+
ubuntu/thunderbird<1:60.4.0+
1:60.4.0+
ubuntu/thunderbird<60.4
60.4
ubuntu/thunderbird<1:60.4.0+
1:60.4.0+
debian/firefox
125.0.3-1
debian/firefox-esr
91.12.0esr-1~deb10u1
115.10.0esr-1~deb10u1
115.7.0esr-1~deb11u1
115.10.0esr-1~deb11u1
115.7.0esr-1~deb12u1
115.10.0esr-1~deb12u1
115.10.0esr-1
debian/thunderbird
1:91.12.0-1~deb10u1
1:115.10.1-1~deb10u1
1:115.7.0-1~deb11u1
1:115.10.1-1~deb11u1
1:115.7.0-1~deb12u1
1:115.10.1-1~deb12u1
1:115.10.1-1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2018-18493?

    CVE-2018-18493 is a vulnerability in the Skia library that can result in a buffer overflow during buffer offset calculations with hardware accelerated canvas 2D actions.

  • Which software versions are affected by CVE-2018-18493?

    Firefox ESR versions prior to 60.4 and Thunderbird versions prior to 60.4 are affected by CVE-2018-18493.

  • How severe is CVE-2018-18493?

    CVE-2018-18493 has a severity rating of 9.8, which is considered critical.

  • What is the remedy for CVE-2018-18493?

    To fix CVE-2018-18493, you should update to Thunderbird version 60.4 or newer, or Firefox ESR version 60.4 or newer.

  • Where can I find more information about CVE-2018-18493?

    You can find more information about CVE-2018-18493 on the Mozilla security advisories page and the bugzilla.mozilla.org page.

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