CVE-2018-18500

HIGH

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.

References

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/

Details

Source: MITRE

Published: 2019-02-05

Updated: 2019-04-02

Type: CWE-416

Risk Information

CVSS v2.0

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 9.8

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

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL