Denial of service in Open vSwitch

1) Input validation error

EUVDB-ID: #VU74579

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-1668

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing IP packets. A remote attacker can send specially crafted IP packets with "ip proto" set to "0" and perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability requires that flow rules contain 'set' actions on other fields in the IP protocol header.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Open vSwitch: 2.0.0 - 3.1.0

External links

http://mail.openvswitch.org/pipermail/ovs-announce/2023-April/000316.html
http://mail.openvswitch.org/pipermail/ovs-announce/2023-April/000317.html

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.