#VU54876 Incorrect default permissions in NetBSD

Vulnerability identifier: #VU54876

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: N/A

CWE-ID: CWE-276

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
NetBSD
Operating systems & Components / Operating system

Vendor: NetBSD Foundation, Inc

Description

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

The vulnerability exists due to incorrect default permissions in kernfs. A local user with access to the system can read any file on the /kern volume.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

NetBSD: 9.0 - 9.2

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External links
https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2021-002.txt.asc

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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.