Multiple vulnerabilities in HashiCorp Consul and Consul Enterprise

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU29127

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-13170

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the affected software does not appropriately enforce scope for local tokens issued by a primary data center, where replication to a secondary data center was not enabled., which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Consul: 1.4.0 - 1.7.3

Consul Enterprise: 1.4.0 - 1.7.3

External links

http://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md
http://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md
http://github.com/hashicorp/consul/pull/8068

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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU29132

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12797

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the affected software fails to enforce changes to legacy ACL token rules due to non-propagation to secondary data centers, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Consul: 1.4.0 - 1.7.3

Consul Enterprise: 1.4.0 - 1.7.3

External links

http://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md
http://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md
http://github.com/hashicorp/consul/pull/8047

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.

3) Improper Resource Shutdown or Release

EUVDB-ID: #VU29133

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-2020-12758

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

Exploit availability: No

Description

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

The vulnerability exists due to the affected can software crash when configured with an abnormally-formed service-router entry. A remote attacker can cause a denial of service condition on the targeted system. 

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Consul: 1.4.0 - 1.7.3

Consul Enterprise: 1.4.0 - 1.7.3

External links

http://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md
http://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md
http://github.com/hashicorp/consul/pull/7783

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.

4) Buffer overflow

EUVDB-ID: #VU29134

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-2020-13250

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in HTTP API and DNS caching feature. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Consul: 0.1.0 - 1.7.3

Consul Enterprise: 0.1.0 - 1.7.3

External links

http://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md
http://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md
http://github.com/hashicorp/consul/pull/8023

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.