CVE-2018-18497

Published: 11 December 2018

Limitations on the URIs allowed to WebExtensions by the browser.windows.create API can be bypassed when a pipe in the URL field is used within the extension to load multiple pages as a single argument. This could allow a malicious WebExtension to open privileged about: or file: locations. This vulnerability affects Firefox < 64.

Priority

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package	Release	Status
firefox Launchpad, Ubuntu, Debian	bionic	Released (64.0+build3-0ubuntu0.18.04.1)
	cosmic	Released (64.0+build3-0ubuntu0.18.10.1)
	trusty	Released (64.0+build3-0ubuntu0.14.04.1)
	upstream	Released (64.0)
	xenial	Released (64.0+build3-0ubuntu0.16.04.1)

Severity score breakdown

Parameter	Value
Base score	6.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

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