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.

The remote NewStart CGSL host, running version MAIN 7.02, has openvswitch packages installed that are affected by multiple vulnerabilities:

  - 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. (CVE-2023-5366)

  - A flaw was found in Open vSwitch where multiple versions are vulnerable to crafted Geneve packets, which     may result in a denial of service and invalid memory accesses. Triggering this issue requires that     hardware offloading via the netlink path is enabled. (CVE-2023-3966)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2024:0631 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2023-3966:
    A flaw was found in Open vSwitch where multiple versions are vulnerable to crafted Geneve packets, which     may result in a denial of service and invalid memory accesses. Triggering this issue requires that     hardware offloading via the netlink path is enabled.

    CVE-2023-5366:
    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.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2023-5366)

Note that Nessus relies on the presence of the package as reported by the vendor.

An update of the openvswitch package has been released.

The remote Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-1f26ce7731 advisory.

    Update to 3.3.0     Remove network-scripts subpackage starting from Fedora 40     Backport a simple fix to avoid SSL db: implementation test to fail     It also indirectly fix CVE-2023-3966 and CVE-2023-5366

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-a4530e9bfe advisory.

    Update to 3.2.2     It indirectly fix CVE-2023-3966 and CVE-2023-5366

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5640 advisory.

    -----BEGIN PGP SIGNED MESSAGE-----     Hash: SHA512

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5640-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     March 14, 2024                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : openvswitch     CVE ID         : CVE-2023-3966 CVE-2023-5366     Debian Bug     : 1063492

    Two vulnerabilities were discovered in Open vSwitch, a software-based     Ethernet virtual switch, which could result in a bypass of OpenFlow     rules or denial of service.

    For the oldstable distribution (bullseye), these problems have been fixed     in version 2.15.0+ds1-2+deb11u5. This update also adresses a memory leak     tracked as CVE-2024-22563.

    For the stable distribution (bookworm), these problems have been fixed in     version 3.1.0-2+deb12u1.

    We recommend that you upgrade your openvswitch packages.

    For the detailed security status of openvswitch please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/openvswitch

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org
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Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6690-1 advisory.

    Timothy Redaelli and Haresh Khandelwal discovered that Open vSwitch incorrectly handled certain crafted     Geneve packets when hardware offloading via the netlink path is enabled. A remote attacker could possibly     use this issue to cause Open vSwitch to crash, leading to a denial of service. (CVE-2023-3966)

    It was discovered that Open vSwitch incorrectly handled certain ICMPv6 Neighbor Advertisement packets. A     remote attacker could possibly use this issue to redirect traffic to arbitrary IP addresses.
    (CVE-2023-5366)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:1234 advisory.

    Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote     per-flow control of traffic.

    Security Fix(es):

    * openvswsitch: ovs-vswitch fails to recover after malformed geneve metadata packet (CVE-2023-3966)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:1227 advisory.

    Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote     per-flow control of traffic.

    Security Fix(es):

    * openvswsitch: ovs-vswitch fails to recover after malformed geneve metadata packet (CVE-2023-3966)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:1235 advisory.

    Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote     per-flow control of traffic.

    Security Fix(es):

    * openvswsitch: ovs-vswitch fails to recover after malformed geneve metadata packet (CVE-2023-3966)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3734 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3734-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Tobias Frost     February 17, 2024                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : openvswitch     Version        : 2.10.7+ds1-0+deb10u5     CVE ID         : CVE-2023-5366     Debian Bug     :

    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.

    For Debian 10 buster, this problem has been fixed in version     2.10.7+ds1-0+deb10u5.

    We recommend that you upgrade your openvswitch packages.

    For the detailed security status of openvswitch please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/openvswitch

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4714-1 advisory.

  - 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. (CVE-2023-5366)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4666-1 advisory.

  - 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. (CVE-2023-5366)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4657-1 advisory.

  - 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. (CVE-2023-5366)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4661-1 advisory.

  - 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. (CVE-2023-5366)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4571-1 advisory.

  - 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. (CVE-2023-5366)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4573-1 advisory.

  - 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. (CVE-2023-5366)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 ESM / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-6514-1 advisory.

    It was discovered that Open vSwitch did not correctly handle OpenFlow rules for ICMPv6 Neighbour     Advertisement packets. A local attacker could possibly use this issue to redirect traffic to arbitrary IP     addresses.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4508-1 advisory.

  - 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. (CVE-2023-5366)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
242778	NewStart CGSL MAIN 7.02 : openvswitch Multiple Vulnerabilities (NS-SA-2025-0196)	Nessus	NewStart CGSL Local Security Checks	medium
239780	TencentOS Server 4: openvswitch (TSSA-2024:0631)	Nessus	Tencent Local Security Checks	medium
237992	NewStart CGSL MAIN 7.02 : openvswitch Multiple Vulnerabilities (NS-SA-2025-0090)	Nessus	NewStart CGSL Local Security Checks	medium
226516	Linux Distros Unpatched Vulnerability : CVE-2023-5366	Nessus	Misc.	medium
204579	Photon OS 4.0: Openvswitch PHSA-2023-4.0-0510	Nessus	PhotonOS Local Security Checks	medium
194715	Fedora 40 : openvswitch (2024-1f26ce7731)	Nessus	Fedora Local Security Checks	medium
192171	Fedora 39 : openvswitch (2024-a4530e9bfe)	Nessus	Fedora Local Security Checks	medium
192117	Debian dsa-5640 : openvswitch-common - security update	Nessus	Debian Local Security Checks	medium
191928	Ubuntu 20.04 LTS / 22.04 LTS / 23.10 : Open vSwitch vulnerabilities (USN-6690-1)	Nessus	Ubuntu Local Security Checks	medium
191724	RHEL 8 : openvswitch2.17 (RHSA-2024:1234)	Nessus	Red Hat Local Security Checks	medium
191723	RHEL 9 : openvswitch3.1 (RHSA-2024:1227)	Nessus	Red Hat Local Security Checks	medium
191722	RHEL 8 : openvswitch3.1 (RHSA-2024:1235)	Nessus	Red Hat Local Security Checks	medium
190675	Debian dla-3734 : openvswitch-common - security update	Nessus	Debian Local Security Checks	medium
186746	SUSE SLES15 Security Update : openvswitch (SUSE-SU-2023:4714-1)	Nessus	SuSE Local Security Checks	medium
186642	SUSE SLES15 / openSUSE 15 Security Update : openvswitch (SUSE-SU-2023:4666-1)	Nessus	SuSE Local Security Checks	medium
186638	SUSE SLES15 / openSUSE 15 Security Update : openvswitch3 (SUSE-SU-2023:4657-1)	Nessus	SuSE Local Security Checks	medium
186636	SUSE SLES15 / openSUSE 15 Security Update : openvswitch (SUSE-SU-2023:4661-1)	Nessus	SuSE Local Security Checks	medium
186348	SUSE SLES15 / openSUSE 15 Security Update : openvswitch (SUSE-SU-2023:4571-1)	Nessus	SuSE Local Security Checks	medium
186346	SUSE SLES15 / openSUSE 15 Security Update : openvswitch (SUSE-SU-2023:4573-1)	Nessus	SuSE Local Security Checks	medium
186289	Ubuntu 18.04 ESM / 20.04 LTS : Open vSwitch vulnerability (USN-6514-1)	Nessus	Ubuntu Local Security Checks	medium
186150	SUSE SLES15 Security Update : openvswitch (SUSE-SU-2023:4508-1)	Nessus	SuSE Local Security Checks	medium

Detections

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CVE-2023-5366

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