Privilege escalation in Mac OS X

1) Improper file permissions handling

EUVDB-ID: #VU1245

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:F/RL:U/RC:C]

CVE-ID: CVE-2007-0117

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

The vulnerability allows a local user to escalation privileges on vulnerable system.

The vulnerability exists in diskutil tool within DiskManagement framework when handling BOM files. A local user can create a specially crafted BOM file, run diskutil with specially crafted BOM file and replace permissions for arbitrary files on vulnerable system.

Successful exploitation of this vulnerability allows a local unprivileged user to elevate his privileges and gain root access to vulnerable system.

Note: the vulnerability is being actively exploited.

Mitigation

Cybersecurity Help is not aware of any official solution to address this vulnerability.

Vulnerable software versions

macOS Server: 10.4.8

macOS: 10.4.8 8L127

External links

http://jon.oberheide.org/moab/MOAB-05-01-2007.html
http://rixstep.com/2/2/20070810,00.shtml

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.