Ubuntu update for ruby2.3

1) Input validation error

EUVDB-ID: #VU87692

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-27281

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when parsing .rdoc_options as a YAML file. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the target system.

Mitigation

Update the affected package ruby2.3 to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

libruby2.5 (Ubuntu package): before Ubuntu Pro

ruby2.5 (Ubuntu package): before Ubuntu Pro

ruby2.3 (Ubuntu package): before Ubuntu Pro (Infra-only)

libruby2.3 (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:libruby2.5_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:ruby2.5_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:ruby23_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libruby2.3_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6838-2

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.