#VU94177 Input validation error in Vault and Vault Enterprise - CVE-2024-6468

Vulnerability identifier: #VU94177

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-6468

CWE-ID: CWE-20

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 attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of requests originating from unauthorized IP addresses when the TCP listener option, proxy_protocol_behavior, was set to deny_unauthorized. When receiving a request from a source IP address that was not listed in proxy_protocol_authorized_addrs, the Vault API server would shut down and no longer respond to any HTTP requests, potentially resulting in denial of service.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Vault: 1.10.0 - 1.17.1

Vault Enterprise: 1.10.0 - 1.17.1

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External links
https://discuss.hashicorp.com/t/hcsec-2024-14-vault-vulnerable-to-denial-of-service-when-setting-a-proxy-protocol-behavior/68518

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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