kritisch
CVE-2020-10188
telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code
In der Trivy Database seit spätestens 24. Okt. 2026, 07:11 UTCWann der Eintrag vor diesem Build hinzukam, ist nicht erfasst.
Einstufung nach Quelle
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
Trivys eigenes Label ist CRITICAL. Kritisch laut NVD, Photon OS. Niedriger laut Red Hat (hoch), Amazon (hoch), Oracle (hoch), Ubuntu (mittel).
Beschreibung
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.
Betroffene Pakete und behobene Versionen
| Quelle | Paket | Behoben in |
|---|---|---|
| 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 und 2 weitere |
| debian 12 | inetutils, netkit-telnet-ssl | 2:1.9.4-12 und 1 weitere |
| debian 13 | inetutils, netkit-telnet-ssl | 2:1.9.4-12 und 1 weitere |
| debian 14 | inetutils, netkit-telnet-ssl | 2:1.9.4-12 und 1 weitere |
| 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 und 1 weitere |
Alle 37 Einträge aus 20 Quellen zeigen
| Quelle | Paket | Behoben in |
|---|---|---|
| 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 |
Referenzen
- 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
Alle 19 Referenzen
- 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