Buffer overflow in Arista Eos
CVE-2020-10188
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.743 (99.5th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.743 · newest: 0.743 · change: 0.000
Affected products
- Arista Eos — versions 4.24.0f
- Juniper Junos — versions 12.3, 12.3r12, 12.3x48
- Netkit Telnet Project
- Oracle Communications Performance Intelligence Center — versions 10.4.0.2
- Debian Linux — versions 8.0, 9.0
- Fedoraproject Fedora — versions 30, 31, 32
Weakness classification (CWE)
References
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2020/05/msg00012.html (mailing-list, Mailing List, Third Party Advisory)
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-telnetd-… (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/08/msg00038.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuApr2021.html (Patch, Third Party Advisory)
- appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetd_28.html (Third Party Advisory)
- github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/telnet/… (Patch, Third Party Advisory)
- www.arista.com/en/support/advisories-notices/security-advisories/10702-security… (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-10188?
- CVE-2020-10188 is a critical-severity vulnerability in Arista Eos, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-03-06.
- How severe is CVE-2020-10188?
- Critical severity. CVSS v3 base score is 9.8 out of 10.