Privilege escalation in fwupd

1) Weak password requirements

EUVDB-ID: #VU75912

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3287

CWE-ID: CWE-521 - Weak Password Requirements

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges within the application.

The vulnerability exists due to the way the redfish plugin handles passwords. When creating an OPERATOR user account on the BMC, the redfish plugin saved the auto-generated password to /etc/fwupd/redfish.conf without proper restriction. A local user can read the configuration file and gain operator privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

fwupd: 1.8.0 - 1.8.4

External links

http://github.com/fwupd/fwupd/commit/ea676855f2119e36d433fbd2ed604039f53b2091

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.