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CVE-2017-5384

Published: 25 January 2017

Proxy Auto-Config (PAC) files can specify a JavaScript function called for all URL requests with the full URL path which exposes more information than would be sent to the proxy itself in the case of HTTPS. Normally the Proxy Auto-Config file is specified by the user or machine owner and presumed to be non-malicious, but if a user has enabled Web Proxy Auto Detect (WPAD) this file can be served remotely. This vulnerability affects Firefox < 51.

Priority

Medium

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
upstream
Released (51)
precise
Released (51.0.1+build2-0ubuntu0.12.04.1)
xenial
Released (51.0.1+build2-0ubuntu0.16.04.1)
yakkety
Released (51.0.1+build2-0ubuntu0.16.10.1)
zesty
Released (52.0.1+build2-0ubuntu1)
trusty
Released (51.0.1+build2-0ubuntu0.14.04.1)
thunderbird
Launchpad, Ubuntu, Debian
upstream Not vulnerable

precise Not vulnerable

trusty Does not exist
(trusty was not-affected)
xenial Not vulnerable

yakkety Not vulnerable

zesty Not vulnerable

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N