CVE-2019-9213
Estado: ModificadaMedia (5.5)—💥 Exploit
En el kernel de Linux, en versiones anteriores a la 4.20.14, expand_downwards en mm/mmap.c carece de una comprobación para la dirección mínima de mmap, lo que facilita que los atacantes exploten desreferencias de puntero NULL en el kernel en plataformas que no son SMAP. Esto esto está relacionado con una comprobación de capacidades para la tarea equivocada.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 5.67%
- Percentil entre todas las CVEs puntuadas: 93
- Fecha de la puntuación: 9/10/2026
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.
- Módulo de Metasploit (exploit fiable y al alcance de cualquiera) · Reliable Datagram Sockets (RDS) rds_atomic_free_op NULL pointer dereference Privilege Escalation
- Publicado en Exploit-DB · Reliable Datagram Sockets (RDS) - rds_atomic_free_op NULL pointer dereference Privilege Escalation (Metasploit) (23/1/2020)
- Publicado en Exploit-DB · Linux < 4.20.14 - Virtual Address 0 is Mappable via Privileged write() to /proc/*/mem (6/3/2019)
Tecnologías afectadas (5)
CWE
- CWE-476
Referencias
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html
- http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html
- http://www.securityfocus.com/bid/107296
- https://access.redhat.com/errata/RHSA-2019:0831
- https://access.redhat.com/errata/RHSA-2019:1479
- https://access.redhat.com/errata/RHSA-2019:1480
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1792
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162
- https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
- https://usn.ubuntu.com/3930-1/
- https://usn.ubuntu.com/3930-2/
- https://usn.ubuntu.com/3931-1/
- https://usn.ubuntu.com/3931-2/
- https://usn.ubuntu.com/3932-1/
- https://usn.ubuntu.com/3932-2/
- https://usn.ubuntu.com/3933-1/
- https://usn.ubuntu.com/3933-2/
- https://www.exploit-db.com/exploits/46502/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html
- http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html
- http://www.securityfocus.com/bid/107296
- https://access.redhat.com/errata/RHSA-2019:0831
- https://access.redhat.com/errata/RHSA-2019:1479
- https://access.redhat.com/errata/RHSA-2019:1480
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1792
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162
- https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
- https://usn.ubuntu.com/3930-1/
- https://usn.ubuntu.com/3930-2/
- https://usn.ubuntu.com/3931-1/
- https://usn.ubuntu.com/3931-2/
- https://usn.ubuntu.com/3932-1/
- https://usn.ubuntu.com/3932-2/
- https://usn.ubuntu.com/3933-1/
- https://usn.ubuntu.com/3933-2/
- https://www.exploit-db.com/exploits/46502/
JSON original (NVD)
Mostrar
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"matchCriteriaId": "815D70A8-47D3-459C-A32C-9FEACA0659D1"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "07C312A0-CD2C-4B9C-B064-6409B25C278F"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}