Vulnerability identifier: #VU9748

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenBSD
Operating systems & Components / Operating system

Vendor: OpenBSD

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

The weakness exists due to insufficient validation of user-supplied data. A remote attacker can send specially crafted MPLS data and cause the target kernel to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OpenBSD: 6.1 - 6.2

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External links
http://ftp.openbsd.org/pub/OpenBSD/patches/6.1/common/033_mpls.patch.sig
http://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/003_mpls.patch.sig

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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.