HashiCorp Consul update for Go

Published: 2023-03-09

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-41724 CVE-2022-41723
CWE-ID	CWE-399 CWE-400
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Consul Enterprise Server applications / Other server solutions Consul Server applications / Other server solutions
Vendor	HashiCorp

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU72685

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-41724

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources in crypto/tls when handling large TLS handshake records. A remote attacker can send specially crafted data to the application and perform a denial of service (DoS) attack.

The vulnerability affects all TLS 1.3 clients, TLS 1.2 clients which explicitly enable session resumption (by setting Config.ClientSessionCache to a non-nil value), and TLS 1.3 servers which request client certificates (by setting Config.ClientAuth >= RequestClientCert).

Mitigation

Install update from vendor's website.

Vulnerable software versions

Consul Enterprise: 1.13.0 - 1.14.4

Consul: 1.13.0 - 1.14.4

CPE2.3

External links

http://github.com/hashicorp/consul/releases/tag/v1.14.5
http://github.com/hashicorp/consul/releases/tag/v1.13.7

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.

2) Resource exhaustion

EUVDB-ID: #VU72686