Vulnerability identifier: #VU18388

Vulnerability risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-401

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 gain access to sensitive kernel information.

The vulnerability exists due memory leak within the SIOCGIFCONF IOCTL command. A local user can read huge amount of kernel memory, including pointers to bypass KASLR, stack canaries which can be used to exploit stack buffer overflows.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

NetBSD: 7.0.2 - 8.0

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External links
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2019-003.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. However, proof of concept for this vulnerability is available.