CVE-2018-18493

Impact:
Important
Public Date:
2018-12-11
CWE:
CWE-120
Bugzilla:
1658400: CVE-2018-18493 Mozilla: Buffer overflow in accelerated 2D canvas with Skia

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2018-18493 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

In general, this flaw be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts.

CVSS v3 metrics

CVSS3 Base Score 7.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (thunderbird) RHSA-2019:0159 2019-01-24
Red Hat Enterprise Linux 7 (thunderbird) RHSA-2019:0160 2019-01-24
Red Hat Enterprise Linux 6 (firefox) RHSA-2018:3831 2018-12-17
Red Hat Enterprise Linux 7 (firefox) RHSA-2018:3833 2018-12-17
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Acknowledgements

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Atte Kettunen as the original reporter.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation