CVE-2019-5101 Information

Description

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. After an SSL connection is initialized via _ustream_ssl_init and after any data (e.g. the client’s HTTP request) is written to the stream using ustream_printf the code eventually enters the function __ustream_ssl_poll which is used to dispatch the read/write events

CVSS Vector

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

Reference

https://talosintelligence.com/vulnerability_reports/TALOS-2019-0893

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.9