Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Netkit Telnet Project | Netkit Telnet | <= 0.17 |
| Fedoraproject | Fedora | 30 |
| Debian | Debian Linux | 8.0 |
| Arista | Eos | <= 4.20.15 |
| Oracle | Communications Performance Intelligence Center | 10.4.0.2 |
| Juniper | Junos | 12.3 |
Related Weaknesses (CWE)
References
- https://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetdThird Party Advisory
- https://github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00012.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00038.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tThird Party Advisory
- https://www.arista.com/en/support/advisories-notices/security-advisories/10702-sThird Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/01/20/8
- https://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetdThird Party Advisory
- https://github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00012.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00038.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2020-10188?
CVE-2020-10188 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 f...
How severe is CVE-2020-10188?
CVE-2020-10188 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2020-10188?
Check the references section above for vendor advisories and patch information. Affected products include: Netkit Telnet Project Netkit Telnet, Fedoraproject Fedora, Debian Debian Linux, Arista Eos, Oracle Communications Performance Intelligence Center.