CVE-2020-10188

9.8 CRITICAL

Published: March 06, 2020 Modified: January 21, 2026

Description

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.

AI Explanation

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetd_28.html

Source: cve@mitre.org

Third Party Advisory

https://github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/telnet/telnetd/utility.c#L205-L216

Source: cve@mitre.org

Patch Third Party Advisory

https://lists.debian.org/debian-lts-announce/2020/05/msg00012.html

Source: cve@mitre.org

Mailing List Third Party Advisory

https://lists.debian.org/debian-lts-announce/2020/08/msg00038.html

Source: cve@mitre.org

Mailing List Third Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7FMTRRQTYKWZD2GMXX3GLZV46OLPCLVK/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLU6FL24BSQQEB2SJC26NLJ2MANQDA7M/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3VJ6V2Z3JRNJOBVHSOPMAC76PSSKG6A/

Source: cve@mitre.org

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-telnetd-EFJrEzPx

Source: cve@mitre.org

Third Party Advisory

https://www.arista.com/en/support/advisories-notices/security-advisories/10702-security-advisory-48

Source: cve@mitre.org

Third Party Advisory

https://www.oracle.com/security-alerts/cpuApr2021.html

Source: cve@mitre.org

Patch Third Party Advisory

http://www.openwall.com/lists/oss-security/2026/01/20/8