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.
CVSS Details
- CVSS 3.1 Base Score: 5.9
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2018 |
| Freebsd | — | Upgrade thunderbirdUpgrade libxulUpgrade firefoxUpgrade seamonkeyUpgrade linux-seamonkeyUpgrade linux-thunderbirdUpgrade linux-firefoxUpgrade firefox-esr | Jan 25, 2017 | Jan 24, 2017 |
| Mfsa2017 01 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 51.0 | Jul 12, 2018 | Jun 11, 2018 |
| Suse | — | Upgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox | Feb 2, 2017 | Jan 24, 2017 |
| Ubuntu | — | Upgrade firefox | Jan 28, 2017 | Jan 24, 2017 |
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