CVE-2022-39237 Digital Signature Hash Algorithms Not Validated in sylabs/sif

Medium 6.3 Published 6 Oct 2022 Updated 23 Apr 2025

Attackers can bypass digital signature verification in Singularity Image Format libraries by using insecure hash algorithms, compromising image integrity.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2022-39237?

CVE-2022-39237 is a medium-severity vulnerability in sylabs sif, published on 6 Oct 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

syslabs/sif is the Singularity Image Format (SIF) reference implementation. In versions prior to 2.8.1the `github.com/sylabs/sif/v2/pkg/integrity` package did not verify that the hash algorithm(s) used are cryptographically secure when verifying digital signatures. A patch is available in version >= v2.8.1 of the module. Users are encouraged to upgrade. Users unable to upgrade may independently validate that the hash algorithm(s) used for metadata digest(s) and signature hash are cryptographically secure.

Weakness: CWE-327, CWE-347

Which versions are affected by CVE-2022-39237?

3 open source packages ship an affected version, including github.com/sylabs/sif/v2. It affects 1 product.

Package	Affected	Fixed in
`github.com/sylabs/sif/v2` Go	All versions	`2.8.1`
`github.com/sylabs/sif/v2` Go	All versions	`2.8.1`
`github.com/sylabs/sif/v2` Go	All versions	`2.8.1`

Linux distribution packages (1)

apptainer openSUSE:Tumbleweed All versions 1.1.2-1.1

Products include Sylabs Singularity Image Format.

How do I fix CVE-2022-39237?

Upgrade github.com/sylabs/sif/v2 to 2.8.1 or later.

Is CVE-2022-39237 being exploited?

There is no known exploitation of CVE-2022-39237 in the wild and no public exploit code.

CVE-2021-29499 Predictable SIF UUID Identifiers High 7.5

Sources

Also known as CLEANSTART-2024-TO97998, DEBIAN-CVE-2022-39237, GHSA-m5m3-46gj-wch8, GO-2022-1045, UBUNTU-CVE-2022-39237, openSUSE-SU-2024:12389-1.