Home/CVE/A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This result
CVE

CVE-2018-18500

A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This result

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.

CRITICAL · CVSS 9.8 EPSS 0.35406
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 3% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

11
mozilla firefox< 65.0
mozilla firefox esr< 60.5
mozilla thunderbird< 60.5
canonical ubuntu linuxall versions
debian linuxall versions
redhat enterprise linux desktopall versions
redhat enterprise linux serverall versions
redhat enterprise linux server ausall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.0 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Feb 2019 · 09:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

18
suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:10600-1
suse-csafopenSUSE-SU-2024:10601-1
suse-csafopenSUSE-SU-2019:1758-1
suse-csafSUSE-SU-2019:0336-2
🔗

References & Sources

13
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
http://www.securityfocus.com/bid/106781Third Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2019/01/msg00025.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00024.htmlMailing ListThird Party Advisory
https://security.gentoo.org/glsa/201903-04Third Party Advisory
https://security.gentoo.org/glsa/201904-07
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