Information disclosure in Mozilla Firefox - CVE-2018-5132

Vulnerability identifier: #VU10975

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-5132

CWE-ID: CWE-200

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to the Find API for WebExtensions can search some privileged pages, such as about:debugging, if these pages are open in a tab. A remote attacker can tuse a malicious WebExtension to search for otherwise protected data if a user has it open.

Mozilla Firefox
firefox (Ubuntu package)

Update to version 59.0.

firefox (Ubuntu package) - addressed in versions 59.0+build5-0ubuntu0.14.04.1, 59.0+build5-0ubuntu0.16.04.1, 59.0+build5-0ubuntu0.17.10.1

• https://www.mozilla.org/en-US/security/advisories/mfsa2018-06/

• Multiple vulnerabilities in Mozilla Firefox
• Ubuntu update for Firefox