#VU66115 Permissions, Privileges, and Access Controls in Vault and Vault Enterprise - CVE-2021-43998

Vulnerability identifier: #VU66115

Vulnerability risk: Medium

CVSSv4.0: 6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-43998

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Vault
Web applications / Modules and components for CMS
Vault Enterprise
Web applications / Modules and components for CMS

Vendor: HashiCorp

Description

The vulnerability allows a remote user to escalate privileges within the application.

The vulnerability exists due to templated ACL policies always match the first-created entity alias if multiple entity aliases exist for a specified entity and mount combination. A remote user can trigger incorrect policy enforcement.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Vault: 1.7.0 - 1.7.5, 1.8.0 - 1.8.4

Vault Enterprise: 1.7.0 - 1.7.5, 1.8.0 - 1.8.4

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External links
https://discuss.hashicorp.com/t/hcsec-2021-30-vaults-templated-acl-policies-matched-first-created-alias-per-entity-and-auth-backend/32132

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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