What’s Vulnerable › Vulnerabilities
CVE-2023-5366: Openvswitch don't match packets on nd_target field
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-10-06 · updated 2026-06-17
- Weakness: CWE-345
Description
A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets between virtual machines to bypass OpenFlow rules. This issue may allow a local attacker to create specially crafted packets with a modified or spoofed target IP address field that can redirect ICMPv6 traffic to arbitrary IP addresses.
Affected products
- Openvswitch: before 2023-02-28 — fixed in 2023-02-28
- Red Hat Enterprise Linux: 7.0
- RedHat Fast Datapath: all versions
- Red Hat OpenShift Container Platform 4.18: 4.0
- RedHat Virtualization: 4.0
How to fix
Upgrade to a fixed version: Openvswitch 2023-02-28. Check the vendor advisory for mitigations.
References
- http://www.openwall.com/lists/oss-security/2024/02/08/4
- https://access.redhat.com/security/cve/CVE-2023-5366
- https://bugzilla.redhat.com/show_bug.cgi?id=2006347
- https://lists.debian.org/debian-lts-announce/2024/02/msg00004.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LFZADABUDOFI2KZIRQBYFZCIKH55RGY3/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VYYUBF6OW2JG7VOFEOROHXGSJCTES3QO/
- http://www.openwall.com/lists/oss-security/2024/02/08/4
- https://access.redhat.com/security/cve/CVE-2023-5366
- https://bugzilla.redhat.com/show_bug.cgi?id=2006347
- https://lists.debian.org/debian-lts-announce/2024/02/msg00004.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LFZADABUDOFI2KZIRQBYFZCIKH55RGY3/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VYYUBF6OW2JG7VOFEOROHXGSJCTES3QO/
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