CVE-2018-18506

Mozilla: Proxy Auto-Configuration file can define localhost access to be proxied

Published Feb 5, 2019 CVSS 3.1 · 5.9 Medium EPSS 2.2% KEV · Not listed
Description
When proxy auto-detection is enabled, if a web server serves a Proxy Auto-Configuration (PAC) file or if a PAC file is loaded locally, this PAC file can specify that requests to the localhost are to be sent through the proxy to another server. This behavior is disallowed by default when a proxy is manually configured, but when enabled could allow for attacks on services and tools that bind to the localhost for networked behavior if they are accessed through browsing. This vulnerability affects Firefox < 65.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-1722-1 firefox-esr security update
Debian DLA Debian DLA DLA-1743-1 thunderbird security update
Debian DSA Debian DSA DSA-4411-1 firefox-esr security update
Debian DSA Debian DSA DSA-4420-1 thunderbird security update
EUVD EUVD EUVD-2018-10231 When proxy auto-detection is enabled, if a web server serves a Proxy Auto-Configuration (PAC) file or if a PAC file is loaded locally, this PAC file can specify that requests to the localhost are to be sent through the proxy to another server. This behavior is disallowed by default when a proxy is manually configured, but when enabled could allow for attacks on services and tools that bind to the localhost for networked behavior if they are accessed through browsing. This vulnerability affects Firefox < 65.
Ubuntu USN Ubuntu USN USN-3874-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-3927-1 Thunderbird vulnerabilities
History

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