Incorrect permission assignment in HashiCorp Vault

1) Incorrect permission assignment for critical resource

EUVDB-ID: #VU66114

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-41802

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

Exploit availability: No

Description

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to incorrect permissions assignment. A remote user with write permission to an entity alias ID can share a mount accessor with another user to acquire this other user’s policies by merging their identities.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Vault: 1.7.0 - 1.8.3

Vault Enterprise: 1.7.0 - 1.8.3

CPE2.3

• cpe:2.3:a:hashicorp:vault:1.7.0:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault:1.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault:1.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault:1.7.3:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault:1.7.4:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault:1.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault:1.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault:1.8.2:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault:1.8.3:*:*:*:*:*:*:*
• cpe:2.3:a:hashicorp:vault_enterprise:1.7.0:*:*:*:*:*:*:*

External links

https://discuss.hashicorp.com/t/hcsec-2021-27-vault-merging-multiple-entity-aliases-for-the-same-mount-may-allow-privilege-escalation/

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.