Home/CVE/A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow
CVE

CVE-2023-1668

A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow

A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.

HIGH · CVSS 8.2 EPSS 0.00239
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-670Always-Incorrect Control Flow Implementation
CWE-670Always-Incorrect Control Flow Implementation
▤

Affected Products & Versions

12
cloudbase open vswitch>= 1.5.0 and < 2.13.11
cloudbase open vswitch>= 2.14.0 and < 2.14.9
cloudbase open vswitch>= 2.15.0 and < 2.15.8
cloudbase open vswitch>= 2.16.0 and < 2.16.7
cloudbase open vswitch>= 2.17.0 and < 2.17.6
cloudbase open vswitch>= 3.0.0 and < 3.0.4
cloudbase open vswitchall versions
debian linuxall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPowershell Detect Virtualization Environment
▣

Scoring & Timeline

8.2
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Apr 2023 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
⚑

Vendor Advisories

17
suse-csafSUSE-SU-2026:0290-1
suse-csafSUSE-SU-2026:0280-1
suse-csafopenSUSE-SU-2024:12942-1
suse-csafSUSE-SU-2023:2621-1
suse-csafSUSE-SU-2023:2536-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=2137666Issue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00000.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2GUNS3WSJG4TUDKZ5L7FXGJMVOD6EJZ/
https://security.gentoo.org/glsa/202311-16
https://www.debian.org/security/2023/dsa-5387Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/04/06/1Mailing ListMitigationPatch
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