Privilege escalation in NetBSD



Published: 2019-12-18
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID N/A
CWE-ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
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NetBSD
Operating systems & Components / Operating system

Vendor NetBSD Foundation, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU23650

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to presence of filemon in default installation of NetBSD. The filemon module is experimental and is not recommended for running on production systems. However it gets automatically auto-loaded when /dev/fliemon is opened, and get accessible to every user on the system.

A local user can gain read/write access to the filemone module and perform a denial of service attack or gain elevated privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NetBSD: 8.1


CPE2.3 External links

http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2019-006.txt.asc

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.



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