CVE-2020-10188

CRITICAL

Juniper Junos < 0.17 - Buffer Overflow

Title source: rule

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.

References (11)

Core 11

Core References

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

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

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

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

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

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

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

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

Third Party Advisory vendor-advisory x_refsource_cisco

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

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

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

Patch, Third Party Advisory x_refsource_misc

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

Third Party Advisory x_refsource_misc

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

Patch, Third Party Advisory x_refsource_misc

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

View Patch ZIP pw:eip

Third Party Advisory x_refsource_misc

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

Mailing List

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

Scores

CVSS v3 9.8

EPSS 0.0958

EPSS Percentile 92.9%

Attack Vector NETWORK

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

Details

CWE

CWE-120

Status published

Products (10)

arista/eos 4.24.0f

arista/eos < 4.20.15

debian/debian_linux 8.0

debian/debian_linux 9.0

fedoraproject/fedora 30

fedoraproject/fedora 31

fedoraproject/fedora 32

juniper/junos 12.3 (27 CPE variants)

juniper/junos 12.3r12

juniper/junos 12.3x48 (15 CPE variants)

Published Mar 06, 2020

Tracked Since Feb 18, 2026