Vulnerability identifier: #VU80812

Vulnerability risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-4680

CWE-ID: CWE-254

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 bypass implemented security restrictions.

The vulnerability exists due to an error when enforcing policies related to convergent encryption feature. Software does not restrict the use of user-provided nonces when performing encryption operations on the transit secrets engine when convergent encryption is not enabled. A remote user authorized by Vault policies to encrypt transit data may be able to decrypt arbitrary ciphertext by performing encryption operations using known plaintexts and nonces.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Vault: 1.14.0 - 1.14.2, 1.13.0 - 1.13.6, 1.12.0 - 1.12.10

Vault Enterprise: 1.14.0 - 1.14.2, 1.13.0 - 1.13.6, 1.12.0 - 1.12.10

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External links
http://discuss.hashicorp.com/t/hcsec-2023-28-vault-s-transit-secrets-engine-allowed-nonce-specified-without-convergent-encryption/58249

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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.