Vulnerability identifier: #VU8493

Vulnerability 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: N/A

CWE-ID: CWE-362

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
NetBSD
Operating systems & Components / Operating system

Vendor: NetBSD Foundation, Inc

Description
The vulnerability allows a local attacker to gain elevated privileges or cause DoS condition on the target system.

The weakness exists due to a missing check in the trap handler and the Linux compatibility layer. A local attacker can trigger race condition, cause the userland kernel space to panic and gain elevated privileges or cause the system to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

NetBSD: 6.0 - 7.1

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External links
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2017-005.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.