#VU35062 Improper Certificate Validation in OpenWrt - CVE-2019-5102
Published: November 18, 2019 / Updated: August 8, 2020
Vulnerability identifier: #VU35062
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-5102
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenWrt
OpenWrt
Software vendor:
openwrt.org
openwrt.org
Description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
An exploitable information leak vulnerability exists in the ustream-ssl library of OpenWrt, versions 18.06.4 and 15.05.1. When connecting to a remote server, the server's SSL certificate is checked but no action is taken when the certificate is invalid. An attacker could exploit this behavior by performing a man-in-the-middle attack, providing any certificate, leading to the theft of all the data sent by the client during the first request.
Remediation
Install update from vendor's website.