Security restrictions bypass in Open vSwitch

1) Insufficient verification of data authenticity

EUVDB-ID: #VU83434

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-5366

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to missing verification of data authenticity when handling ICMPv6 Neighbor Advertisement packets between virtual machines. A local user can bypass OpenFlow rules and send otherwise restricted packets.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Open vSwitch: 2.1.0 - 3.2.1

External links

http://bugzilla.redhat.com/show_bug.cgi?id=2006347
http://github.com/openvswitch/ovs/commit/489553b1c21692063931a9f50b6849b23128443c
http://mail.openvswitch.org/pipermail/ovs-announce/2024-February/000339.html

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.