Remote code execution in SnakeYaml

1) Deserialization of Untrusted Data

EUVDB-ID: #VU70385

Risk: High

CVSSv3.1: 9.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:C]

CVE-ID: CVE-2022-1471

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: Yes

Description

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

The vulnerability exists due to insecure input validation when processing serialized data within the SnakeYaml's Constructor() class. A remote attacker can pass specially crafted yaml content to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Snakeyaml: 1.1 - 1.33

External links

http://github.com/google/security-research/security/advisories/GHSA-mjmj-j48q-9wg2
http://bitbucket.org/snakeyaml/snakeyaml/issues/561/cve-2022-1471-vulnerability-in
http://bugzilla.redhat.com/show_bug.cgi?id=2150009

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, a fully functional exploit for this vulnerability is available.