CVE-2017-5384

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.

• CWE-200

• http://www.securityfocus.com/bid/95763Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037693Third Party Advisory, VDB Entry
• https://bugzilla.mozilla.org/show_bug.cgi?id=1255474Issue Tracking, Patch, Vendor Advisory
• https://www.contextis.com//resources/blog/leaking-https-urls-20-year-old-vulnerability/Exploit, Technical Description, Third Party Advisory
• https://www.mozilla.org/security/advisories/mfsa2017-01/Vendor Advisory
• http://www.securityfocus.com/bid/95763Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1037693Third Party Advisory, VDB Entry
• https://bugzilla.mozilla.org/show_bug.cgi?id=1255474Issue Tracking, Patch, Vendor Advisory
• https://www.contextis.com//resources/blog/leaking-https-urls-20-year-old-vulnerability/Exploit, Technical Description, Third Party Advisory
• https://www.mozilla.org/security/advisories/mfsa2017-01/Vendor Advisory

Published

Jun 11, 2018

Last Modified

Jun 17, 2026

Status

Modified