Ubuntu update for Ruby

1) Command injection

EUVDB-ID: #VU9718

Risk: High

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-17405

CWE-ID: CWE-77 - Command injection

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The weakness exists due to flaws in the Net::FTP. A remote attacker can inject and execute arbitrary commands with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages

Ubuntu 17.10:

libruby2.3 2.3.3-1ubuntu1.1

ruby2.3 2.3.3-1ubuntu1.1

Ubuntu 17.04:

libruby2.3 2.3.3-1ubuntu0.3

ruby2.3 2.3.3-1ubuntu0.3

Ubuntu 16.04 LTS:

libruby2.3 2.3.1-2~16.04.4

ruby2.3 2.3.1-2~16.04.4

Ubuntu 14.04 LTS:

libruby2.0 2.0.0.484-1ubuntu2.5

ruby1.9.1 1.9.3.484-2ubuntu1.6

libruby1.9.1 1.9.3.484-2ubuntu1.6

ruby1.9.3 1.9.3.484-2ubuntu1.6

ruby2.0 2.0.0.484-1ubuntu2.5

Vulnerable software versions

Ubuntu: 14.04 - 17.10

External links

http://www.ubuntu.com/usn/usn-3515-1/

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. However, proof of concept for this vulnerability is available.