Information disclosure in Terraform

1) Cleartext transmission of sensitive information

EUVDB-ID: #VU23455

Risk: Medium

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

CVE-ID: CVE-2019-19316

CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information

Exploit availability: No

Description

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

The vulnerability exists in the "github.com/hashicorp/terraform/tree/master/backend/remote-state/azure" due to software uses insecure communication channel to transmit sensitive information when using the Azure backend with a shared access signature (SAS). A remote attacker with ability to intercept network traffic can gain access to sensitive data, such as the token and state snapshot.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Terraform: 0.1.0 - 0.12.16

External links

http://github.com/hashicorp/terraform/security/advisories/GHSA-4rvg-555h-r626
http://github.com/hashicorp/terraform/issues/23493

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.