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AUSCERT External Security Bulletin Redistribution
CVE-2021-3040 Bridgecrew Checkov: Unsafe deserialization of
Terraform files allows code execution
10 June 2021
AusCERT Security Bulletin Summary
Product: Bridgecrew Checkov 2.0
Publisher: Palo Alto
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
CVE Names: CVE-2021-3040
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Palo Alto Networks Security Advisories / CVE-2021-3040
CVE-2021-3040 Bridgecrew Checkov: Unsafe deserialization of Terraform files
allows code execution
Severity 6.7 . MEDIUM
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required HIGH
User Interaction NONE
Confidentiality Impact HIGH
Integrity Impact HIGH
Availability Impact LOW
An unsafe deserialization vulnerability in Bridgecrew Checkov by Prisma Cloud
allows arbitrary code execution when processing a malicious terraform file.
This issue impacts Checkov 2.0 versions earlier than Checkov 2.0.139.
Checkov 1.0 versions are not impacted.
Versions Affected Unaffected
Bridgecrew Checkov 2.0 < 2.0.139 >= 2.0.139
Bridgecrew Checkov 1.0 None all
CVSSv3.1 Base Score: 6.7 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L)
Palo Alto Networks is not aware of any malicious exploitation of this issue.
CWE-502 Deserialization of Untrusted Data
This issue is fixed in Checkov 2.0.139 and all later versions.
Workarounds and Mitigations
Do not run Checkov on terraform files from untrusted sources or pull requests.
Palo Alto Networks thanks Bryan Eastes for discovering and reporting this
2021-06-09 Initial publication
Policy Report vulnerabilitiesManage subscriptions
(C) 2020 Palo Alto Networks, Inc. All rights reserved.
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