The remote Debian 11 host has a package installed that is affected by a vulnerability as referenced in the dsa-5048 advisory.

    It was discovered that the libreswan IPsec implementation could be forced into a crash/restart via a     malformed IKEv1 packet, resulting in denial of service. For the stable distribution (bullseye), this     problem has been fixed in version 4.3-1+deb11u1. We recommend that you upgrade your libreswan packages.
    For the detailed security status of libreswan please refer to its security tracker page at:
    https://security-tracker.debian.org/tracker/libreswan

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

  - Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference     and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object     exists. This is fixed in 4.6. (CVE-2022-23094)

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

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2022:0216 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2022-23094:
    Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference     and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object     exists. This is fixed in 4.6.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux 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 Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2022:0199 advisory.

  - Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference     and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object     exists. This is fixed in 4.6. (CVE-2022-23094)

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

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2022:0199 advisory.

    Libreswan is an implementation of IPsec and IKE for Linux. IPsec is the Internet Protocol Security and     uses strong cryptography to provide both authentication and encryption services. These services allow you     to build secure tunnels through untrusted networks such as virtual private network (VPN).

    Security Fix(es):

    * libreswan: Malicious IKEv1 packet can cause libreswan to restart (CVE-2022-23094)

    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 this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2022-0199 advisory.

    [4.4-4.0.1]
    - Add libreswan-oracle.patch to detect Oracle Linux distro

    [4.4-4]
    - Resolves: rhbz#2036902 rebuild to enable rpminspect

    [4.4-3]
    - Resolves: rhbz#2036902: fix patch application

    [4.4-2]
    - Resolves: rhbz#2036902 ikev1: disable diagnostics logging on receiving malformed packets

Tenable has extracted the preceding description block directly from the Oracle Linux 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 Redhat Enterprise Linux 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2022:0239 advisory.

    Libreswan is an implementation of IPsec and IKE for Linux. IPsec is the Internet Protocol Security and     uses strong cryptography to provide both authentication and encryption services. These services allow you     to build secure tunnels through untrusted networks such as virtual private network (VPN).

    Security Fix(es):

    * libreswan: Malicious IKEv1 packet can cause libreswan to restart (CVE-2022-23094)

    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 this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2022:0199 advisory.

  - Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference     and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object     exists. This is fixed in 4.6. (CVE-2022-23094)

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	Published	Updated	Severity
156767	Debian DSA-5048-1 : libreswan - security update	Nessus	Debian Local Security Checks	1/16/2022	1/24/2025	high
257448	Linux Distros Unpatched Vulnerability : CVE-2022-23094	Nessus	Misc.	8/27/2025	8/27/2025	high
236138	Alibaba Cloud Linux 3 : 0216: libreswan (ALINUX3-SA-2022:0216)	Nessus	Alibaba Cloud Linux Local Security Checks	5/14/2025	5/14/2025	high
184698	Rocky Linux 8 : libreswan (RLSA-2022:0199)	Nessus	Rocky Linux Local Security Checks	11/6/2023	11/6/2023	high
156913	RHEL 8 : libreswan (RHSA-2022:0199)	Nessus	Red Hat Local Security Checks	1/20/2022	11/7/2024	high
156875	Oracle Linux 8 : libreswan (ELSA-2022-0199)	Nessus	Oracle Linux Local Security Checks	1/20/2022	10/22/2024	high
157051	RHEL 8 : libreswan (RHSA-2022:0239)	Nessus	Red Hat Local Security Checks	1/25/2022	11/7/2024	high
158841	AlmaLinux 8 : libreswan (ALSA-2022:0199)	Nessus	Alma Linux Local Security Checks	3/11/2022	11/6/2023	high

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