# CVE-2020-10188: telnet-server: Telnet is a popular protocol for logging in to remote systems over the Internet

CVE-2020-10188 is fixed in 13 products on 1 platform, first by inetutils-ftp 2:1.9.4-3ubuntu0.1, released March 6, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-10188
- Priority: High
- CVSS: 9.8 (Important)
- EPSS: 0.7434
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 6, 2020

## Description

Telnet is a popular protocol for logging in to remote systems over the Internet. The telnet-server packages include a telnet service that supports remote logins into the host machine. The telnet service is disabled by default.  Security Fix(es):  * telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code (CVE-2020-10188)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | inetutils-ftp Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-ftp 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-ftp-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-ftp Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-ftp 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-ftp-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-ftpd Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-ftpd 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-ftpd-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-ftpd Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-ftpd 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-ftpd-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-inetd Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-inetd 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-inetd-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-inetd Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-inetd 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-inetd-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-ping Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-ping 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-ping-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-ping Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-ping 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-ping-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-syslogd Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-syslogd 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-syslogd-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-syslogd Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-syslogd 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-syslogd-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-talk Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-talk 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-talk-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-talk Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-talk 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-talk-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-talkd Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-talkd 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-talkd-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-talkd Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-talkd 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-talkd-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-telnet Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-telnet 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-telnet-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-telnet Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-telnet 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-telnet-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-telnetd Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-telnetd 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-telnetd-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-telnetd Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-telnetd 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-telnetd-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-tools Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-tools 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-tools-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-tools Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-tools 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-tools-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-traceroute Ubuntu 18.04.6 LTS (bionic) | 2:1.9.4-3ubuntu0.1 | [inetutils-traceroute 2:1.9.4-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-inetutils-traceroute-2-1.9.4-3ubuntu0.1.md) | Mar 6, 2020 |
| Linux | inetutils-traceroute Ubuntu 20.04 LTS (focal) | 2:1.9.4-11ubuntu0.1 | [inetutils-traceroute 2:1.9.4-11ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-inetutils-traceroute-2-1.9.4-11ubuntu0.1.md) | Mar 6, 2020 |
| Linux | telnet ol 8 | 1:0.17-73.el8_1.1 | [ELSA-2020-1318](https://patchblox.com/security/data/fix/linux/elsa-2020-1318.md) | Apr 7, 2020 |
| Linux | telnet-server RHEL 8 | 1:0.17-73.el8_1.1 | [RHSA-2020:1318](https://patchblox.com/security/data/fix/linux/rhsa-2020-1318.md) | Apr 6, 2020 |
| Linux | telnet-server ol 8 | 1:0.17-73.el8_1.1 | [ELSA-2020-1318](https://patchblox.com/security/data/fix/linux/elsa-2020-1318.md) | Apr 7, 2020 |

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