Description

Functions SDK for EdgeX is meant to provide all the plumbing necessary for developers to get started in processing/transforming/exporting data out of the EdgeX IoT platform. In affected versions broken encryption in app-functions-sdk “AES” transform in EdgeX Foundry releases prior to Jakarta allows attackers to decrypt messages via unspecified vectors. The app-functions-sdk exports an “aes” transform that user scripts can optionally call to encrypt data in the processing pipeline. No decrypt function is provided. Encryption is not enabled by default, but if used, the level of protection may be less than the user may expects due to a broken implementation. Version v2.1.0 (EdgeX Foundry Jakarta release and later) of app-functions-sdk-go/v2 deprecates the “aes” transform and provides an improved “aes256” transform in its place. The broken implementation will remain in a deprecated state until it is removed in the next EdgeX major release to avoid breakage of existing software that depends on the broken implementation. As the broken transform is a library function that is not invoked by default, users who do not use the AES transform in their processing pipelines are unaffected. Those that are affected are urged to upgrade to the Jakarta EdgeX release and modify processing pipelines to use the new "aes256" transform.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  5.7 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

CNA:  GitHub, Inc.

Base Score:  5.4 MEDIUM

Vector:  CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score:  2.6 LOW

Vector:  (AV:N/AC:H/Au:N/C:P/I:N/A:N)

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/edgexfoundry/app-functions-sdk-go/commit/8fa13c6388ce76a6b878b54490eac61aa7d81165	Patch  Third Party Advisory
https://github.com/edgexfoundry/app-functions-sdk-go/security/advisories/GHSA-6c7m-qwxj-mvhp	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-327	Use of a Broken or Risky Cryptographic Algorithm	GitHub, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Initial Analysis by NIST 11/22/2021 8:47:31 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:edgexfoundry:app_service_configurable:*:*:*:*:*:go:*:* versions up to (excluding) 2.1.0 *cpe:2.3:a:edgexfoundry:application_functions_software_development_kit:*:*:*:*:*:go:*:* versions up to (excluding) 2.1.0 *cpe:2.3:a:edgexfoundry:edgex_foundry:*:*:*:*:*:*:*:* versions up to (excluding) 2.1.0
Added	CVSS V2		NIST (AV:N/AC:H/Au:N/C:P/I:N/A:N)
Added	CVSS V2 Metadata		Victim must voluntarily interact with attack mechanism
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Changed	Reference Type	https://github.com/edgexfoundry/app-functions-sdk-go/commit/8fa13c6388ce76a6b878b54490eac61aa7d81165 No Types Assigned	https://github.com/edgexfoundry/app-functions-sdk-go/commit/8fa13c6388ce76a6b878b54490eac61aa7d81165 Patch, Third Party Advisory
Changed	Reference Type	https://github.com/edgexfoundry/app-functions-sdk-go/security/advisories/GHSA-6c7m-qwxj-mvhp No Types Assigned	https://github.com/edgexfoundry/app-functions-sdk-go/security/advisories/GHSA-6c7m-qwxj-mvhp Third Party Advisory