CVE-2022-31605 Unsafe yaml deserialization in NVFlare

Critical 9.8 Published 1 Jul 2022 Updated 3 Aug 2024

An unprivileged network attacker can achieve remote code execution or denial of service in NVIDIA FLARE due to unsafe YAML deserialization.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2022-31605?

CVE-2022-31605 is a critical unsafe deserialization vulnerability in NVIDIA FLARE, published on 1 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

NVFLARE, versions prior to 2.1.2, 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.

Weakness: CWE-502

Which versions are affected by CVE-2022-31605?

3 open source packages ship an affected version, including nvflare. It affects 1 product.

Package	Affected	Fixed in
`nvflare` PyPI	All versions	`2.1.2`
`nvflare` PyPI	All versions	`2.1.2`
`nvflare` PyPI	All versions	`2.1.2`

Products include Nvidia Nvflare.

How do I fix CVE-2022-31605?

Upgrade nvflare to 2.1.2 or later.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2022-31605 being exploited?

There is no known exploitation of CVE-2022-31605 in the wild and no public exploit code.

Sources

Also known as GHSA-hrf3-622q-8366, PYSEC-2022-232.