Security restrictions bypass in OpenBSD

1) Security restrictions bypass

EUVDB-ID: #VU9782

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local attacker to bypass security restrictions on the target system.

The weakness exists due to insufficient security checks in the fktrace(2) processing tracing system call. A local attacker can make a specially crafted system call and bypass intended security restrictions.

Mitigation

Install update from vendor's website.

Vulnerable software versions

OpenBSD: 6.2

External links

http://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/002_fktrace.patch.sig

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.