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Unsafe yaml deserialization in NVFlare

Critical severity GitHub Reviewed Published Jun 21, 2022 in NVIDIA/NVFlare • Updated Sep 2, 2023

Package

pip nvflare (pip)

Affected versions

< 2.1.2

Patched versions

2.1.2

Description

Impact

NVFLARE contains a vulnerability in its utils module, where YAML files are loaded via yaml.load() instead of yaml.safe_load(). The deserialization of Untrusted Data, may allow an unprivileged network attacker to cause Remote Code Execution, Denial Of Service, and Impact to both Confidentiality and Integrity.

All versions before 2.1.2 are affected.
CVSS Score = 9.8
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Patches

The patch will be included in nvflare==2.1.2

Workarounds

Change yaml.load() to yaml.safe_load()

Additional information

Issue Found by: Oliver Sellwood (@Nintorac)

References

@chesterxgchen chesterxgchen published to NVIDIA/NVFlare Jun 21, 2022
Published to the GitHub Advisory Database Jun 22, 2022
Reviewed Jun 22, 2022
Published by the National Vulnerability Database Jul 1, 2022
Last updated Sep 2, 2023

Severity

Critical
9.8
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CVE ID

CVE-2022-31605

GHSA ID

GHSA-hrf3-622q-8366

Source code

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