Bridgecrew Checkov 2.0: Execute Arbitrary Code/Commands -- Existing Account

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.2057
        CVE-2021-3040 Bridgecrew Checkov: Unsafe deserialization of
                   Terraform files allows code execution
                               10 June 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Bridgecrew Checkov 2.0
Publisher:         Palo Alto
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-3040  

Original Bulletin: 
   https://securityadvisories.paloaltonetworks.com/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

047910
Severity 6.7 . MEDIUM
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required HIGH
User Interaction NONE
Scope UNCHANGED
Confidentiality Impact HIGH
Integrity Impact HIGH
Availability Impact LOW
NVD JSON     
Published 2021-06-09
Updated 2021-06-09
Reference
Discovered externally

Description

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.

Product Status

       Versions        Affected  Unaffected
Bridgecrew Checkov 2.0 < 2.0.139 >= 2.0.139
Bridgecrew Checkov 1.0 None      all

Severity: MEDIUM

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)

Exploitation Status

Palo Alto Networks is not aware of any malicious exploitation of this issue.

Weakness Type

CWE-502 Deserialization of Untrusted Data

Solution

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.

Acknowledgments

Palo Alto Networks thanks Bryan Eastes for discovering and reporting this
issue.

Timeline

2021-06-09 Initial publication
Terms of usePrivacyProduct Security Assurance and Vulnerability Disclosure
Policy Report vulnerabilitiesManage subscriptions
(C) 2020 Palo Alto Networks, Inc. All rights reserved.

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