Public Date:
1670631: CVE-2018-18500 Mozilla: Use-after-free parsing HTML5 stream

The MITRE CVE dictionary describes this issue as:

A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.

Find out more about CVE-2018-18500 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

CVSS3 Base Score 8.8
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
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 7 (thunderbird) RHSA-2019:0270 2019-02-04
Red Hat Enterprise Linux 6 (thunderbird) RHSA-2019:0269 2019-02-04
Red Hat Enterprise Linux 7 (firefox) RHSA-2019:0219 2019-01-30
Red Hat Enterprise Linux 6 (firefox) RHSA-2019:0218 2019-01-30
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.


Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Yaniv Frank (SophosLabs) as the original reporter.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation