#VU83434 Insufficient verification of data authenticity in Open vSwitch - CVE-2023-5366

Vulnerability identifier: #VU83434

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-5366

CWE-ID: CWE-345

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Open vSwitch
Hardware solutions / Firmware

Vendor: openvswitch.org

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 - 2.17.8, 2.2, 2.3 - 2.3.2, 2.4 - 2.4.1, 2.5.0 - 2.5.12, 2.6.0 - 2.6.10, 2.7.0 - 2.7.13, 2.8.0 - 2.8.11, 2.9.0 - 2.9.9, 3.0.0 - 3.0.5, 3.1.0 - 3.1.3, 3.2.0 - 3.2.1

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

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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.