CVE-2018-18497 — Improper Input Validation in Mozilla Firefox

CWE-20 — Improper Input ValidationCWE-59 — Link FollowingCWE-270 — Privilege Context Switching ErrorCWE-552 — Files or Directories Accessible to External Parties8 documents7 sources
Severity
6.5MEDIUMNVD
OSV9.8
EPSS
0.2%
top 55.66%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxDebian FirefoxCanonical Ubuntu Linux
Timeline
PublishedFeb 28
Latest updateMay 13

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.

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶debiandebian/firefox< firefox 64.0-1 (sid)
▶CVEListV5mozilla/firefoxunspecified — 64
▶NVDmozilla/firefox< 64.0
▶Ubuntumozilla/firefox< 64.0+build3-0ubuntu0.14.04.1+2

Also affects: Ubuntu Linux 14.04, 16.04, 18.04, 18.10

🔴Vulnerability Details

3
GHSA
GHSA-9467-r3c9-7387: Limitations on the URIs allowed to WebExtensions by the browser↗2022-05-13
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OSV
CVE-2018-18497: Limitations on the URIs allowed to WebExtensions by the browser↗2018-12-11
▶
OSV
firefox vulnerabilities↗2018-12-11
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📋Vendor Advisories

3
Ubuntu
Firefox vulnerabilities↗2018-12-11
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Red Hat
firefox: WebExtensions can load arbitrary URLs through pipe separators↗2018-12-11
▶
Debian
CVE-2018-18497: firefox - Limitations on the URIs allowed to WebExtensions by the browser.windows.create A...↗2018
▶

💬Community

1
Bugzilla
CVE-2018-18497 firefox: WebExtensions can load arbitrary URLs through pipe separators↗2019-04-04
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