SB2022092412 - Denial of srevice in HashiCorp Consul
Published: September 24, 2022 Updated: August 28, 2023
Security Bulletin ID
SB2022092412
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Missing Authorization (CVE-ID: CVE-2021-41803)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation when handling auto-config requests. A remote authenticated user can craft an auto-config request that allows the TLS certificate and ACL token to be generated for a node name not intended by the operator. This forces Consul to store unintended information, which can be repeatedly abused to cause an authenticated denial of service attack from a malicious operator.
Remediation
Install update from vendor's website.