OS X Vulnerability Can Allow Superuser Access to Unauthorized Users
Users looking to exploit a vulnerability in the Sudo Unix command, originally reported back in March, have received some assistance, reports Ars Technica.
The developers of Metasploit, software that makes it easier to misuse vulnerabilities in operating systems and applications, have added the Sudo vulnerability to their software suite. All versions of OS X from OS X Lion 10.7 through the current Mountain Lion 10.8.4 remain vulnerable.
Mac users should realize that an attacker must satisfy a variety of conditions before being able to exploit this vulnerability. For one, the end-user who is logged in must already have administrator privileges. And for another, the user must have successfully run sudo at least once in the past. And of course, the attacker must already have either physical or remote shell access to the target machine. In other words: this exploit can't be used in the kind of drive-by webpage attacks that last year infected some 650,000 Macs with the Flashback malware. This doesn't mean it's a non-issue though, since the exploit can be used in concert with other attacks to magnify the damage they can do.
Most of the recent exploits in Mac OS X have been related to Java, which Apple completely blocked earlier this year over security vulnerabilities, though Apple did release a standalone malware removal tool to help clean machines that were affected by a number of Java vulnerabilities.
OS X has been targeted more in recent years as it has gained in popularity. The Janicab.A malware was discovered last month, while another program called macs.app was discovered in May. That app captured and stored screenshots.
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Top Rated Comments
Admin != root
So an exploit that needs admin rights access and one that rehires you to have used sudo isn't one that is high priority. The number of users that run sudo at all is really small, and from a security standpoint, if you have admin rights, all security goes out the window. In other words, you don't have security.
The following command should give you root if you are logged in to OS X as an Administrator and have used the "sudo" command at least once in the past. It will also set your system clock to 01/01/1970.
sudo -k
systemsetup -setusingnetworktime Off -settimezone GMT -setdate 01:01:1970 -settime 00:00
sudo su
To set your system clock back to normal, go into the System Preferences and set the time and time zone back to the way it was.
To prevent somebody from abusing this attack, you will need to run the following command after every time you use the sudo command, until it gets patched.
sudo -K