Denial of service in OpenBSD

1) Improper initialization

EUVDB-ID: #VU14206

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: N/A

CWE-ID: CWE-665 - Improper Initialization

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to incorrect initialization of the FPU. A remote attacker can trigger floating point exceptions when the affected software is running on Xen and cause the service to crash.

Mitigation

Update to version 6.2.

Vulnerable software versions

OpenBSD: 6.0 - 6.1

CPE2.3

• cpe:2.3:o:openbsd:openbsd:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:openbsd:openbsd:6.1:*:*:*:*:*:*:*

External links

https://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/021_fpuinit.patch.sig

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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