Vulnerability identifier: #VU99235

Vulnerability risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Nomad
Server applications / Virtualization software

Vendor: HashiCorp

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of case-sensitive characters in Client FS API. A local user with read-fs permissions but not alloc-exec permissions to read files from the secrets dir.

Note, the vulnerability affects installations on case-insensitive file systems, such as Windows, macOS, and Linux with obscure ext4 options enabled.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nomad: 1.9.0, 1.8.0 - 1.8.4, 1.7.3 - 1.7.7, 1.6.7 - 1.6.10, 1.5.14 - 1.5.17

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External links
http://github.com/hashicorp/nomad/releases/tag/v1.9.1
http://github.com/hashicorp/nomad/pull/24125

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.