CVE-2018-18500 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html http://www.securityfocus.com/bid/106781 https://access.redhat.com/errata/RHSA-2019:0218 https://access.redhat.com/errata/RHSA-2019:0219 https://access.redhat.com/errata/RHSA-2019:0269 https://access.redhat.com/errata/RHSA-2019:0270 https://lists.debian.org/debian-lts-announce/2019/01/msg00025.html https://lists.debian.org/debian-lts-announce/2019/02/msg00024.html https://security.gentoo.org/glsa/201903-04 https://security.gentoo.org/glsa/201904-07 https://usn.ubuntu.com/3874-1/ https://usn.ubuntu.com/3897-1/ https://www.debian.org/security/2019/dsa-4376 https://www.debian.org/security/2019/dsa-4392 https://www.mozilla.org/security/advisories/mfsa2019-01/ https://www.mozilla.org/security/advisories/mfsa2019-02/ https://www.mozilla.org/security/advisories/mfsa2019-03/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8