crítica
CVE-2018-20020
libvncserver: Heap out-of-bound write inside structure in VNC client code allows for potential code execution
En la Trivy database desde, como mínimo, el 24 oct 2026, 07:11 UTCNo consta cuándo entró antes de ese build.
Severidad por fuente
NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat8.8CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
La etiqueta propia de Trivy es CRITICAL. Crítica según NVD. Más baja según Red Hat (media), Ubuntu (media).
Descripción
LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| debian 10 | ssvnc | 1.0.29-4+deb10u1 |
| debian 11 | libvncserver, ssvnc, veyon | 0.9.11+dfsg-1.2 y 2 más |
| debian 12 | libvncserver, ssvnc, veyon | 0.9.11+dfsg-1.2 y 2 más |
| debian 13 | libvncserver, ssvnc, veyon | 0.9.11+dfsg-1.2 y 2 más |
| debian 14 | libvncserver, ssvnc | 0.9.11+dfsg-1.2 y 1 más |
| debian 8 | italc, libvncserver, ssvnc | 1:2.0.2+dfsg1-2+deb8u1 y 2 más |
| debian 9 | libvncserver, ssvnc | 0.9.11+dfsg-1.3~deb9u1 y 1 más |
| echo | libvncserver, ssvnc, veyon | 0.9.11+dfsg-1.2 y 2 más |
| Red Hat | libvncserver, libvncserver-devel | sin corrección indicada |
| ubuntu 14.04 | libvncserver | 0.9.9+dfsg-1ubuntu1.4 |
| ubuntu 14.04-ESM | tightvnc | 1.3.9-6.5+deb8u1build0.14.04.1~esm1 |
| ubuntu 16.04 | italc, libvncserver, ssvnc | 1:2.0.2+dfsg1-4ubuntu0.1 y 2 más |
Mostrar las 36 entradas de 16 fuentes
| Fuente | Paquete | Corregido en |
|---|---|---|
| debian 10 | ssvnc | 1.0.29-4+deb10u1 |
| debian 11 | libvncserver | 0.9.11+dfsg-1.2 |
| debian 11 | ssvnc | 1.0.29-5 |
| debian 11 | veyon | 4.1.4+repack1-1 |
| debian 12 | libvncserver | 0.9.11+dfsg-1.2 |
| debian 12 | ssvnc | 1.0.29-5 |
| debian 12 | veyon | 4.1.4+repack1-1 |
| debian 13 | libvncserver | 0.9.11+dfsg-1.2 |
| debian 13 | ssvnc | 1.0.29-5 |
| debian 13 | veyon | 4.1.4+repack1-1 |
| debian 14 | libvncserver | 0.9.11+dfsg-1.2 |
| debian 14 | ssvnc | 1.0.29-5 |
| debian 8 | italc | 1:2.0.2+dfsg1-2+deb8u1 |
| debian 8 | libvncserver | 0.9.9+dfsg2-6.1+deb8u4 |
| debian 8 | ssvnc | 1.0.29-2+deb8u1 |
| debian 9 | libvncserver | 0.9.11+dfsg-1.3~deb9u1 |
| debian 9 | ssvnc | 1.0.29-3+deb9u1 |
| echo | libvncserver | 0.9.11+dfsg-1.2 |
| echo | ssvnc | 1.0.29-5 |
| echo | veyon | 4.1.4+repack1-1 |
| Red Hat | libvncserver | sin corrección indicada |
| Red Hat | libvncserver-devel | sin corrección indicada |
| ubuntu 14.04 | libvncserver | 0.9.9+dfsg-1ubuntu1.4 |
| ubuntu 14.04-ESM | tightvnc | 1.3.9-6.5+deb8u1build0.14.04.1~esm1 |
| ubuntu 16.04 | italc | 1:2.0.2+dfsg1-4ubuntu0.1 |
| ubuntu 16.04 | libvncserver | 0.9.10+dfsg-3ubuntu0.16.04.3 |
| ubuntu 16.04 | ssvnc | 1.0.29-2+deb8u1build0.16.04.1 |
| ubuntu 16.04-ESM | italc | 1:2.0.2+dfsg1-4ubuntu0.1 |
| ubuntu 16.04-ESM | libvncserver | 0.9.10+dfsg-3ubuntu0.16.04.3 |
| ubuntu 16.04-ESM | ssvnc | 1.0.29-2+deb8u1build0.16.04.1 |
| ubuntu 18.04 | italc | 1:3.0.3+dfsg1-3ubuntu0.1 |
| ubuntu 18.04 | libvncserver | 0.9.11+dfsg-1ubuntu1.1 |
| ubuntu 18.04-ESM | italc | 1:3.0.3+dfsg1-3ubuntu0.1 |
| ubuntu 18.04-ESM | libvncserver | 0.9.11+dfsg-1ubuntu1.1 |
| ubuntu 18.04-ESM | ssvnc | sin corrección indicada |
| ubuntu 18.10 | libvncserver | 0.9.11+dfsg-1.1ubuntu0.1 |
Referencias
- https://access.redhat.com/security/cve/CVE-2018-20020
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/
- https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html
- https://nvd.nist.gov/vuln/detail/CVE-2018-20020
- https://security.gentoo.org/glsa/201908-05
- https://security.gentoo.org/glsa/202006-06
Las 18 referencias
- https://ubuntu.com/security/notices/USN-3877-1
- https://ubuntu.com/security/notices/USN-4547-1
- https://ubuntu.com/security/notices/USN-4547-2
- https://ubuntu.com/security/notices/USN-4587-1
- https://usn.ubuntu.com/3877-1/
- https://usn.ubuntu.com/4547-1/
- https://usn.ubuntu.com/4547-2/
- https://usn.ubuntu.com/4587-1/
- https://www.cve.org/CVERecord?id=CVE-2018-20020
- https://www.debian.org/security/2019/dsa-4383