The remote AlmaLinux 8 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2023:3095 advisory.

  - Libreswan 4.9 allows remote attackers to cause a denial of service (assert failure and daemon restart) via     crafted TS payload with an incorrect selector length. (CVE-2023-23009)

Note that Nessus has not tested for this issue 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-2024:0008 advisory.

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

    CVE-2023-23009:
    Libreswan 4.9 allows remote attackers to cause a denial of service (assert failure and daemon restart) via     crafted TS payload with an incorrect selector length.

    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 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 remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2023:2633 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: remote DoS via crafted TS payload with an incorrect selector length (CVE-2023-23009)

    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 CentOS Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the libreswan-4.9-4.el9 build changelog.

  - remote DoS via crafted TS payload with an incorrect selector length (rhbz#2173674) (CVE-2023-23009)

  - 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-2023-30570)

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

The remote AlmaLinux 9 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2023:2633 advisory.

  - Libreswan 4.9 allows remote attackers to cause a denial of service (assert failure and daemon restart) via     crafted TS payload with an incorrect selector length. (CVE-2023-23009)

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-2023-3095 advisory.

    [4.9-2.0.1.2]
    - Add libreswan-oracle.patch to detect Oracle Linux distro

    [4.9-2.2]
    - Update libreswan-4.9-2176248-authby-rsasig.patch

    [4.9-2.1]
    - Resolves: rhbz#2187647 authby=rsasig fails in FIPS policy

    [4.9-2]
    - Fix CVE-2023-23009: remote DoS via crafted TS payload with an       incorrect selector length (rhbz#2186127)

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
176129	AlmaLinux 8 : libreswan (ALSA-2023:3095)	Nessus	Alma Linux Local Security Checks	2023/5/19	2023/5/19	medium
238575	TencentOS Server 4: libreswan (TSSA-2024:0008)	Nessus	Tencent Local Security Checks	2025/6/16	2025/11/20	high
175401	RHEL 9 : libreswan (RHSA-2023:2633)	Nessus	Red Hat Local Security Checks	2023/5/11	2024/11/7	medium
191415	CentOS 9 : libreswan-4.9-4.el9	Nessus	CentOS Local Security Checks	2024/2/29	2024/4/26	high
175643	AlmaLinux 9 : libreswan (ALSA-2023:2633)	Nessus	Alma Linux Local Security Checks	2023/5/14	2023/5/14	medium
176344	Oracle Linux 8 : libreswan (ELSA-2023-3095)	Nessus	Oracle Linux Local Security Checks	2023/5/24	2024/10/22	medium

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