#VU7079 Information disclosure in Firefox ESR - CVE-2017-7768

Vulnerability identifier: #VU7079

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-7768

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

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

Vendor: Mozilla

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

The weakness exists in the Mozilla Windows Updater due to improper access control. A local attacker can use Mozilla Maintenance Service to bypass system protections and read 32 bytes of any arbitrary file on the local system.

Successful exploitation of the vulnerability results in information disclosure.

Mitigation
Update to version 52.2.

Vulnerable software versions

Firefox ESR: 38.0 - 38.8.0, 45.0 - 45.8, 52.0.1

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2017-16/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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