crítica
CVE-2020-10188
telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
La etiqueta propia de Trivy es CRITICAL. Crítica según NVD, Photon OS. Más baja según Red Hat (alta), Amazon (alta), Oracle (alta), Ubuntu (media).
Descripción
utility.c in telnetd in netkit telnet through 0.17 allows remote attackers to execute arbitrary code via short writes or urgent data, because of a buffer overflow involving the netclear and nextitem functions.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| Photon OS 4.0 | netkit-telnet, netkit-telnet-server | 0.17-5.ph4 |
| Photon OS 5.0 | netkit-telnet, netkit-telnet-server | 0.17-8.ph5 |
| amazon linux 1 | telnet, telnet-debuginfo, telnet-server | 1:0.17-49.9.amzn1 |
| amazon linux 2 | telnet, telnet-debuginfo, telnet-server | 1:0.17-65.amzn2 |
| debian 10 | inetutils | 2:1.9.4-7+deb10u1 |
| debian 11 | inetutils, netkit-telnet, netkit-telnet-ssl | 2:1.9.4-12 y 2 más |
| debian 12 | inetutils, netkit-telnet-ssl | 2:1.9.4-12 y 1 más |
| debian 13 | inetutils, netkit-telnet-ssl | 2:1.9.4-12 y 1 más |
| debian 14 | inetutils, netkit-telnet-ssl | 2:1.9.4-12 y 1 más |
| debian 8 | inetutils | 2:1.9.2.39.3a460-3+deb8u1 |
| debian 9 | inetutils | 2:1.9.4-2+deb9u1 |
| echo | inetutils, netkit-telnet-ssl | 2:1.9.4-12 y 1 más |
Mostrar las 37 entradas de 20 fuentes
| Fuente | Paquete | Corregido en |
|---|---|---|
| Photon OS 4.0 | netkit-telnet | 0.17-5.ph4 |
| Photon OS 4.0 | netkit-telnet-server | 0.17-5.ph4 |
| Photon OS 5.0 | netkit-telnet | 0.17-8.ph5 |
| Photon OS 5.0 | netkit-telnet-server | 0.17-8.ph5 |
| amazon linux 1 | telnet | 1:0.17-49.9.amzn1 |
| amazon linux 1 | telnet-debuginfo | 1:0.17-49.9.amzn1 |
| amazon linux 1 | telnet-server | 1:0.17-49.9.amzn1 |
| amazon linux 2 | telnet | 1:0.17-65.amzn2 |
| amazon linux 2 | telnet-debuginfo | 1:0.17-65.amzn2 |
| amazon linux 2 | telnet-server | 1:0.17-65.amzn2 |
| debian 10 | inetutils | 2:1.9.4-7+deb10u1 |
| debian 11 | inetutils | 2:1.9.4-12 |
| debian 11 | netkit-telnet | 0.17-18woody2 |
| debian 11 | netkit-telnet-ssl | 0.17.17+0.1-2woody3 |
| debian 12 | inetutils | 2:1.9.4-12 |
| debian 12 | netkit-telnet-ssl | 0.17.17+0.1-2woody3 |
| debian 13 | inetutils | 2:1.9.4-12 |
| debian 13 | netkit-telnet-ssl | 0.17.17+0.1-2woody3 |
| debian 14 | inetutils | 2:1.9.4-12 |
| debian 14 | netkit-telnet-ssl | 0.17.17+0.1-2woody3 |
| debian 8 | inetutils | 2:1.9.2.39.3a460-3+deb8u1 |
| debian 9 | inetutils | 2:1.9.4-2+deb9u1 |
| echo | inetutils | 2:1.9.4-12 |
| echo | netkit-telnet-ssl | 0.17.17+0.1-2woody3 |
| Oracle Linux 6 | krb5-appl-clients | 1.0.1-10.el6_10 |
| Oracle Linux 6 | krb5-appl-servers | 1.0.1-10.el6_10 |
| Oracle Linux 6 | telnet | 1:0.17-49.el6_10 |
| Oracle Linux 6 | telnet-server | 1:0.17-49.el6_10 |
| Oracle Linux 7 | telnet | 1:0.17-65.el7_8 |
| Oracle Linux 7 | telnet-server | 1:0.17-65.el7_8 |
| Oracle Linux 8 | telnet | 1:0.17-73.el8_1.1 |
| Oracle Linux 8 | telnet-server | 1:0.17-73.el8_1.1 |
| ubuntu 16.04-ESM | inetutils | 2:1.9.4-1ubuntu0.1~esm1 |
| ubuntu 18.04 | inetutils | 2:1.9.4-3ubuntu0.1 |
| ubuntu 18.04-ESM | inetutils | 2:1.9.4-3ubuntu0.1 |
| ubuntu 20.04 | inetutils | 2:1.9.4-11ubuntu0.1 |
| ubuntu 20.04-ESM | inetutils | 2:1.9.4-11ubuntu0.1 |
Referencias
- http://www.openwall.com/lists/oss-security/2026/01/20/8
- https://access.redhat.com/security/cve/CVE-2020-10188
- https://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetd_28.html
- https://github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/telnet/telnetd/utility.c#L205-L216
- https://linux.oracle.com/cve/CVE-2020-10188.html
- https://linux.oracle.com/errata/ELSA-2020-1349.html
- https://lists.debian.org/debian-lts-announce/2020/05/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/08/msg00038.html
Las 19 referencias
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7FMTRRQTYKWZD2GMXX3GLZV46OLPCLVK/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HLU6FL24BSQQEB2SJC26NLJ2MANQDA7M/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K3VJ6V2Z3JRNJOBVHSOPMAC76PSSKG6A/
- https://nvd.nist.gov/vuln/detail/CVE-2020-10188
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-telnetd-EFJrEzPx
- https://ubuntu.com/security/notices/USN-5048-1
- https://ubuntu.com/security/notices/USN-5048-2
- https://ubuntu.com/security/notices/USN-7781-1
- https://www.arista.com/en/support/advisories-notices/security-advisories/10702-security-advisory-48
- https://www.cve.org/CVERecord?id=CVE-2020-10188
- https://www.oracle.com/security-alerts/cpuApr2021.html