Cross-namespace denial of service in HashiCorp Vault Enterprise

1) Improper Privilege Management

EUVDB-ID: #VU81265

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-3775

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect enforcement of Sentinel Role Governing Policy. A remote user can create a Role Governing Policy (RGP) in one namespace and use it to restrict resources in another, non-child namespace.

Sentinel RGP’s can be set by users authorized to write to the /sys/policies/rgp endpoint. These policies can be used to restrict or deny access to resources, but cannot grant additional access. As a result, this vulnerability is limited to denial of service.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Vault Enterprise: 0.11.0 - 1.14.3

External links

http://discuss.hashicorp.com/t/hcsec-2023-29-vault-enterprise-s-sentinel-rgp-policies-allowed-for-cross-namespace-denial-of-service/58653

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.