Privilege escalation in Insights Core client

1) Incorrect default permissions

EUVDB-ID: #VU82890

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-3972

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to unsafe handling of temporary files and directories. Before the insights-client has been registered on the system by root, an unprivileged local user can create the /var/tmp/insights-client directory. After the client is registered by root, the local user can execute arbitrary files with root privileges from the affected directory.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Insights Core: 3.0.28 - 3.2.11

External links

http://bugzilla.redhat.com/show_bug.cgi?id=2227027

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.