Code injection when parsing YAML files in Apache Commons Configuration

1) Code Injection

EUVDB-ID: #VU26146

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-1953

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to insecure configuration of third-party library for parsing YAML files. A remote attacker with ability to pass YAML file to the application can inject and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Commons Configuration: 2.2 - 2.6

CPE2.3

• cpe:2.3:a:apache_foundation:configuration:2.2:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:configuration:2.3:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:configuration:2.4:*:*:*:*:*:*:*

External links

https://lists.apache.org/thread.html/d0e00f2e147a9e9b13a6829133092f349b2882bf6860397368a52600@%3Cannounce.tomcat.apache.org%3E
https://lists.apache.org/thread.html/rde2186ad6ac0d6ed8d51af7509244adcf1ce0f9a3b7e1d1dd3b64676@%3Ccommits.camel.apache.org%3E

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.