The remote CentOS Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the libreswan-4.12-1.el9 build changelog.

  - An issue was discovered in Libreswan before 4.12. When an IKEv2 Child SA REKEY packet contains an invalid     IPsec protocol ID number of 0 or 1, an error notify INVALID_SPI is sent back. The notify payload's     protocol ID is copied from the incoming packet, but the code that verifies outgoing packets fails an     assertion that the protocol ID must be ESP (2) or AH(3) and causes the pluto daemon to crash and restart.
    NOTE: the earliest affected version is 3.20. (CVE-2023-38710)

  - An issue was discovered in Libreswan before 4.12. When an IKEv1 Quick Mode connection configured with     ID_IPV4_ADDR or ID_IPV6_ADDR receives an IDcr payload with ID_FQDN, a NULL pointer dereference causes a     crash and restart of the pluto daemon. NOTE: the earliest affected version is 4.6. (CVE-2023-38711)

  - An issue was discovered in Libreswan 3.x and 4.x before 4.12. When an IKEv1 ISAKMP SA Informational     Exchange packet contains a Delete/Notify payload followed by further Notifies that act on the ISAKMP SA,     such as a duplicated Delete/Notify message, a NULL pointer dereference on the deleted state causes the     pluto daemon to crash and restart. (CVE-2023-38712)

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 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-dbc6d8a124 advisory.

    Update to 4.12 for CVE-2023-38710, CVE-2023-38711 and CVE-2023-38712     addressing post-authentication denial of service attacks

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 RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2023:7052 advisory.

    * libreswan: Invalid IKEv2 REKEY proposal causes restart (CVE-2023-38710)

    * libreswan: Invalid IKEv1 Quick Mode ID causes restart (CVE-2023-38711)

    * libreswan: Invalid IKEv1 repeat IKE SA delete causes crash and restart (CVE-2023-38712)

Tenable has extracted the preceding description block directly from the RockyLinux 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.

  - An issue was discovered in Libreswan before 4.12. When an IKEv1 Quick Mode connection configured with     ID_IPV4_ADDR or ID_IPV6_ADDR receives an IDcr payload with ID_FQDN, a NULL pointer dereference causes a     crash and restart of the pluto daemon. NOTE: the earliest affected version is 4.6. (CVE-2023-38711)

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

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

  - An issue was discovered in Libreswan 3.x and 4.x before 4.12. When an IKEv1 ISAKMP SA Informational     Exchange packet contains a Delete/Notify payload followed by further Notifies that act on the ISAKMP SA,     such as a duplicated Delete/Notify message, a NULL pointer dereference on the deleted state causes the     pluto daemon to crash and restart. (CVE-2023-38712)

  - An issue was discovered in Libreswan before 4.12. When an IKEv2 Child SA REKEY packet contains an invalid     IPsec protocol ID number of 0 or 1, an error notify INVALID_SPI is sent back. The notify payload's     protocol ID is copied from the incoming packet, but the code that verifies outgoing packets fails an     assertion that the protocol ID must be ESP (2) or AH(3) and causes the pluto daemon to crash and restart.
    NOTE: the earliest affected version is 3.20. (CVE-2023-38710)

  - An issue was discovered in Libreswan before 4.12. When an IKEv1 Quick Mode connection configured with     ID_IPV4_ADDR or ID_IPV6_ADDR receives an IDcr payload with ID_FQDN, a NULL pointer dereference causes a     crash and restart of the pluto daemon. NOTE: the earliest affected version is 4.6. (CVE-2023-38711)

  - The Libreswan Project was notified of an issue causing libreswan to restart when using IKEv1 without     specifying an esp= line. When the peer requests AES-GMAC, libreswan's default proposal handler causes an     assertion failure and crashes and restarts. IKEv2 connections are not affected. (CVE-2024-3652)

Note that Nessus has not tested for these issues 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 multiple vulnerabilities as referenced in the ELSA-2023-7052 advisory.

    - Update to 4.12 to fix CVE-2023-38710, CVE-2023-38711, CVE-2023-38712

Tenable has extracted the preceding description block directly from the Oracle 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 a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2023:7052 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: Invalid IKEv2 REKEY proposal causes restart (CVE-2023-38710)

    * libreswan: Invalid IKEv1 Quick Mode ID causes restart (CVE-2023-38711)

    * libreswan: Invalid IKEv1 repeat IKE SA delete causes crash and restart (CVE-2023-38712)

    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.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.9 Release Notes     linked from 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 Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2024:0039 advisory.

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

    CVE-2023-2295:
    A vulnerability was found in the libreswan library. This security issue occurs when an IKEv1 Aggressive     Mode packet is received with only unacceptable crypto algorithms, and the response packet is not sent with     a zero responder SPI. When a subsequent packet is received where the sender reuses the libreswan responder     SPI as its own initiator SPI, the pluto daemon state machine crashes. No remote code execution is     possible. This CVE exists because of a CVE-2023-30570 security regression for libreswan package in Red Hat     Enterprise Linux 8.8 and Red Hat Enterprise Linux 9.2.

    CVE-2023-30570:
    pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via     unauthenticated IKEv1 Aggressive Mode packets. The earliest affected version is 3.28.

    CVE-2023-38710:
    An issue was discovered in Libreswan before 4.12. When an IKEv2 Child SA REKEY packet contains an invalid     IPsec protocol ID number of 0 or 1, an error notify INVALID_SPI is sent back. The notify payload's     protocol ID is copied from the incoming packet, but the code that verifies outgoing packets fails an     assertion that the protocol ID must be ESP (2) or AH(3) and causes the pluto daemon to crash and restart.
    NOTE: the earliest affected version is 3.20.

    CVE-2023-38711:
    An issue was discovered in Libreswan before 4.12. When an IKEv1 Quick Mode connection configured with     ID_IPV4_ADDR or ID_IPV6_ADDR receives an IDcr payload with ID_FQDN, a NULL pointer dereference causes a     crash and restart of the pluto daemon. NOTE: the earliest affected version is 4.6.

    CVE-2023-38712:
    An issue was discovered in Libreswan 3.x and 4.x before 4.12. When an IKEv1 ISAKMP SA Informational     Exchange packet contains a Delete/Notify payload followed by further Notifies that act on the ISAKMP SA,     such as a duplicated Delete/Notify message, a NULL pointer dereference on the deleted state causes the     pluto daemon to crash and restart.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
191308	CentOS 9 : libreswan-4.12-1.el9	Nessus	CentOS Local Security Checks	2024/2/29	2024/4/26	medium
179994	Fedora 37 : libreswan (2023-dbc6d8a124)	Nessus	Fedora Local Security Checks	2023/8/20	2024/11/14	medium
316324	RockyLinux 8 : libreswan (RLSA-2023:7052)	Nessus	Rocky Linux Local Security Checks	2026/5/22	2026/5/22	medium
226528	Linux Distros Unpatched Vulnerability : CVE-2023-38711	Nessus	Misc.	2025/3/5	2026/7/2	medium
242820	NewStart CGSL MAIN 7.02 : libreswan Multiple Vulnerabilities (NS-SA-2025-0120)	Nessus	NewStart CGSL Local Security Checks	2025/7/25	2025/7/25	medium
186124	Oracle Linux 8 : libreswan (ELSA-2023-7052)	Nessus	Oracle Linux Local Security Checks	2023/11/21	2025/9/9	medium
185676	RHEL 8 : libreswan (RHSA-2023:7052)	Nessus	Red Hat Local Security Checks	2023/11/14	2024/11/7	medium
236374	Alibaba Cloud Linux 3 : 0039: libreswan (ALINUX3-SA-2024:0039)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	high

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