Information disclosure in OpenBSD

1) Information disclosure

EUVDB-ID: #VU14810

Risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N/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 remote attacker to gain access to sensitive information.

The vulnerability exists due to improper access control to LDTR registry on AMD systems in sys/arch/amd64/amd64/vmm_support.S. A remote attacker with access to virtual machine can access data in LDTR registry that belong to another virtual machine.

Mitigation

Install patch from vendor's website.

Vulnerable software versions

OpenBSD: 6.2

External links

http://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/024_ldtr.patch.sig

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.