CVE-2020-28348 Path Traversal in HashiCorp Nomad

Medium 6.5 Published 24 Nov 2020 Updated 4 Aug 2024

Attackers can subvert the Docker file sandbox in HashiCorp Nomad via volume mounts, potentially escaping the container to execute code or escalate privileges.

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

What is CVE-2020-28348?

CVE-2020-28348 is a medium-severity path traversal vulnerability in n/a, published on 24 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

HashiCorp Nomad and Nomad Enterprise 0.9.0 up to 0.12.7 client Docker file sandbox feature may be subverted when not explicitly disabled or when using a volume mount type. Fixed in 0.12.8, 0.11.7, and 0.10.8.

Weakness: CWE-22

Which versions are affected by CVE-2020-28348?

7 open source packages ship an affected version, including github.com/hashicorp/nomad. It affects 1 product.

Package	Affected	Fixed in
`github.com/hashicorp/nomad` Go	From `0.11.0-beta1`	`0.11.7`
`github.com/hashicorp/nomad` Go	From `0.11.0-beta1`	`0.11.7`
`github.com/hashicorp/nomad` Go	From `0.12.0-beta1`	`0.12.8`
`github.com/hashicorp/nomad` Go	From `0.12.0-beta1`	`0.12.8`
`github.com/hashicorp/nomad` Go	From `0.9.0`	`0.10.8, 0.11.7, 0.12.8`
`github.com/hashicorp/nomad` Go	From `0.9.0`	`0.10.8`

1 more packages

github.com/hashicorp/nomad Go From 0.9.0 0.10.8

Products include Hashicorp Nomad.

How do I fix CVE-2020-28348?

Upgrade github.com/hashicorp/nomad to a fixed version for your release line: 0.11.7, 0.12.8 or 0.10.8.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-28348 being exploited?

There is no known exploitation of CVE-2020-28348 in the wild and no public exploit code.

Sources

Also known as GHSA-5x92-p4p5-33c4, GO-2022-0770.