FreeBSD : kio: Information Leak when accessing https when using a malicious PAC file (f714d8ab-028e-11e7-8042-50e549ebab6c)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

Albert Astals Cid reports :

Using a malicious PAC file, and then using exfiltration methods in the
PAC function FindProxyForURL() enables the attacker to expose full
https URLs.

This is a security issue since https URLs may contain sensitive
information in the URL authentication part (user:[email protected]), and
in the path and the query (e.g. access tokens).

This attack can be carried out remotely (over the LAN) since proxy
settings allow 'Detect Proxy Configuration Automatically'. This
setting uses WPAD to retrieve the PAC file, and an attacker who has
access to the victim's LAN can interfere with the WPAD protocols
(DHCP/DNS+HTTP) and inject his/her own malicious PAC instead of the
legitimate one.

See also :

https://www.kde.org/info/security/advisory-20170228-1.txt
http://www.nessus.org/u?fc555341

Solution :

Update the affected packages.

Risk factor :

High

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 97692 ()

Bugtraq ID:

CVE ID:

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