CVE-2018-18497

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

http://www.securityfocus.com/bid/106167

https://bugzilla.mozilla.org/show_bug.cgi?id=1488180

https://usn.ubuntu.com/3844-1/

https://www.mozilla.org/security/advisories/mfsa2018-29/

Details

Source: MITRE

Published: 2019-02-28

Updated: 2020-08-24

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM

Tenable Plugins

View all (6 total)

IDNameProductFamilySeverity
122192Mozilla Firefox < 64.0NessusMacOS X Local Security Checks
critical
700411Mozilla Firefox < 64 Multiple VulnerabilitiesNessus Network MonitorWeb Clients
critical
119654Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : Firefox vulnerabilities (USN-3844-1)NessusUbuntu Local Security Checks
critical
119636FreeBSD : mozilla -- multiple vulnerabilities (d10b49b2-8d02-49e8-afde-0844626317af)NessusFreeBSD Local Security Checks
critical
119604Mozilla Firefox < 64.0 Multiple VulnerabilitiesNessusWindows
critical
119603Mozilla Firefox < 64.0 Multiple Vulnerabilities (macOS) (deprecated)NessusMacOS X Local Security Checks
critical