Improper access control in HashiCorp Consul Enterprise



Published: 2021-12-16
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-41805
CWE-ID CWE-284
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Consul
Server applications / Other server solutions

Vendor HashiCorp

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper access control

EUVDB-ID: #VU59041

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-41805

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote user to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions. An ACL token (with the default operator:write permissions) in one namespace can be used for unintended privilege escalation in a different namespace. A remote user can send a specially crafted request and gain unauthorized access to the affected application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Consul: 1.8.0 - 1.8.16, 1.9.0 - 1.9.10, 1.10.0 - 1.10.3


CPE2.3 External links

http://discuss.hashicorp.com/t/hcsec-2021-29-consul-enterprise-namespace-default-acls-allow-privilege-escalation/31871
http://github.com/hashicorp/consul/releases/tag/v1.10.4
http://github.com/hashicorp/consul/releases/tag/v1.9.11
http://github.com/hashicorp/consul/releases/tag/v1.8.17

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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