Authentication bypass in HashiCorp Consul



Published: 2019-03-19
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-8336
CWE-ID CWE-287
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		Consul
Server applications / Other server solutions

Vendor HashiCorp

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Improper Authentication

EUVDB-ID: #VU18016

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-8336

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to a logical error when processing replications. A remote attacker can supply secret "<hidden>, bypass authentication process and gain unauthorized access to the application.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

Consul: 1.4.0 - 1.4.2

External links

http://github.com/hashicorp/consul/issues/5423


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. However, proof of concept for this vulnerability is available.



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