CVE-2017-5384

MEDIUM

Firefox < 51.0 - HTTPS URL Exposure via Proxy Auto-Config

Title source: llm

Description

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.

References (5)

Core 5

Core References

Exploit, Technical Description, Third Party Advisory x_refsource_misc

https://www.contextis.com//resources/blog/leaking-https-urls-20-year-old-vulnerability/

Issue Tracking, Patch, Vendor Advisory x_refsource_confirm

https://bugzilla.mozilla.org/show_bug.cgi?id=1255474

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id/1037693

Vendor Advisory x_refsource_confirm

https://www.mozilla.org/security/advisories/mfsa2017-01/

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/95763

Scores

CVSS v3 5.9

EPSS 0.0076

EPSS Percentile 73.7%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE

CWE-200

Status published

Products (1)

mozilla/firefox < 51.0

Published Jun 11, 2018

Tracked Since Feb 18, 2026