Information disclosure in FreeBSD

1) Information disclosure

EUVDB-ID: #VU40838

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-1415

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The bsdinstall installer in FreeBSD 10.x before 10.1 p9, when configuring full disk encrypted ZFS, uses world-readable permissions for the GELI keyfile (/boot/encryption.key), which allows local users to obtain sensitive key information by reading the file.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FreeBSD: 10.0 - 10.1

External links

http://packetstormsecurity.com/files/131338/FreeBSD-10.x-ZFS-encryption.key-Disclosure.html
http://www.securityfocus.com/archive/1/535209/100/0/threaded
http://www.securitytracker.com/id/1032042
http://www.freebsd.org/security/advisories/FreeBSD-SA-15:08.bsdinstall.asc

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.