#VU66116 Permissions, Privileges, and Access Controls in Vault Enterprise and Vault - CVE-2021-45042

Vulnerability identifier: #VU66116

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-45042

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

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

Vendor: HashiCorp

Description

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

The vulnerability exists due to application does not properly impose security restrictions in clusters using the Integrated Storage backend. A remote user with write permissions to a kv secrets engine can cause a panic and denial of service of the storage backend.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Vault Enterprise: 1.4.0 - 1.4.7, 1.5.0 - 1.5.9, 1.6.0 - 1.6.7, 1.7.0 - 1.7.6, 1.8.0 - 1.8.5, 1.9.0

Vault: 1.4.0 - 1.4.7, 1.5.0 - 1.5.9, 1.6.0 - 1.6.7, 1.7.0 - 1.7.6, 1.8.0 - 1.8.5, 1.9.0

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External links
https://discuss.hashicorp.com/t/hcsec2-21-33-vault-s-kv-secrets-engine-with-integrated-storage-exposed-to-authenticated-denial-of-service/33157
https://www.hashicorp.com/blog/category/vault

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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.