CVE-2018-18500
Estado: ModificadaCrítica (9.8)—💥 PoC
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
- Versión: 3.0
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 13%
- Percentil entre todas las CVEs puntuadas: 96
- Fecha de la puntuación: 7/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
💥 Exploits públicos
Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.
- Prueba de concepto en GitHub (no verificada) · Lista de pruebas de concepto en GitHub
⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.
Tecnologías afectadas (11)
Canonical — Ubuntu LinuxDebian — Debian LinuxMozilla — FirefoxMozilla — Firefox ESRMozilla — ThunderbirdRedhat — Enterprise Linux DesktopRedhat — Enterprise Linux ServerRedhat — Enterprise Linux Server AUSRedhat — Enterprise Linux Server EUSRedhat — Enterprise Linux Server TUSRedhat — Enterprise Linux Workstation
CWE
- CWE-416
Referencias
- 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/
- 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/
JSON original (NVD)
Mostrar
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