Vulnerability identifier: #VU10975

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-5132

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers

Vendor: Mozilla

Description
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.

Mitigation
Update to version 59.0.

Vulnerable software versions

Mozilla Firefox: 58.0

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External links
http://www.mozilla.org/en-US/security/advisories/mfsa2018-06/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.