SB2020020510 - Multiple vulnerabilities in HashiCorp Consul and Consul Enterprise

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2020-7955)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected software does not uniformly enforce ACLs across all API endpoints "v1/agent/health/service/*". A remote attacker can gain unauthorized access to sensitive information on the system.

2) Resource exhaustion (CVE-ID: CVE-2020-7219)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 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

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the HTTP/RPC services allowed unbounded resource usage. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://github.com/hashicorp/consul/issues/7160
• https://www.hashicorp.com/blog/category/consul/
• https://github.com/hashicorp/consul/issues/7159