Vulnerability identifier: #VU10848

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-17790

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ruby
Universal components / Libraries / Scripting languages

Vendor: Ruby

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

The weakness exists in the lazy_initialize function due to command injection. A remote attacker can send a specially crafted request, inject and execute arbitrary commands.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ruby: 2.4.3

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External links
http://github.com/ruby/ruby/pull/1777

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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.