#VU42731 Improper Authentication in etcd - CVE-2020-15136
Published: August 11, 2020
Vulnerability identifier: #VU42731
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-15136
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
etcd
etcd
Software vendor:
CoreOS
CoreOS
Description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to gateway TLS authentication is only applied to endpoints detected in DNS SRV records. When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints function. No authentication is performed against endpoints provided in the --endpoints flag.
Remediation
Install updates from vendor's website.