PT-2017-16471 · Mozilla+3 · Firefox+3

Alex Chapman + 1 · Published 2017-01-24 · Updated 2024-12-12 · CVE-2017-5384

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 51

Description The issue concerns Proxy Auto-Config (PAC) files, which can specify a JavaScript function that is called for all URL requests, potentially exposing more information than would be sent to the proxy itself in the case of HTTPS. Normally, the Proxy Auto-Config file is presumed to be non-malicious, but if a user has enabled Web Proxy Auto Detect (WPAD), this file can be served remotely, introducing a potential risk.

Recommendations For Firefox versions prior to 51, update to version 51 or later to resolve the issue. As a temporary workaround, consider disabling Web Proxy Auto Detect (WPAD) to minimize the risk of exploitation. Restrict access to remote Proxy Auto-Config files to prevent potential malicious activity.

Exploit

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

ALT-PU-2017-1138

ALT-PU-2017-1578

CVE-2017-5384

MGASA-2017-0323

OPENSUSE-SU-2017_0358-1

OPENSUSE-SU-2024:10600-1

OPENSUSE-SU-2024:14572-1

USN-3175-1

USN-3175-2

Affected Products

Alt Linux

Firefox

Suse

Ubuntu

References · 1907

• 🔥 https://contextis.com//resources/blog/leaking-https-urls-20-year-old-vulnerability · Exploit
• https://ubuntu.com/security/CVE-2017-5390 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:14572-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5374 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5383 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-5384 · Security Note
• https://ubuntu.com/security/CVE-2017-5373 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5387 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2017-01/#CVE-2017-5384 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1255474 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2017-01 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5378 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-5376 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3175-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2017-0323 · Vendor Advisory