A flaw was found in libnbd. The client did not always correctly verify the NBD server's certificate when using TLS to connect to an NBD server. This issue allows a man-in-the-middle attack on NBD traffic.

Security Update for Libnbd

The remote Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2024:6757 advisory.

    * libnbd: NBD server improper certificate validation (CVE-2024-7383)

Tenable has extracted the preceding description block directly from the Rocky 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 packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-6964 advisory.

    - Fix CVE-2024-7383 NBD server improper certificate validation       resolves: RHEL-52728

    libtpms     libvirt     libvirt-dbus     libvirt-python     nbdkit     netcf     perl-Sys-Virt     qemu-kvm
    - kvm-nbd-server-CVE-2024-7409-Avoid-use-after-free-when-c.patch [RHEL-52611]

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 AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2024:6964 advisory.

    * QEMU: virtio: DMA reentrancy issue leads to double free vulnerability (CVE-2024-3446)
    * QEMU: Denial of Service via Improper Synchronization in QEMU NBD Server During Socket Closure     (CVE-2024-7409)
    * libnbd: NBD server improper certificate validation (CVE-2024-7383)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2024:6757 advisory.

    * libnbd: NBD server improper certificate validation (CVE-2024-7383)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2024-6757 advisory.

    [1.18.1-4.0.1]
    - Add new content to nbd_connect_uri.pod

    [1.18.1-4]
    - Fix CVE-2024-7383 NBD server improper certificate validation       resolves: RHEL-52730

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 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2024:6757 advisory.

    Network Block Device (NBD) is a protocol for accessing Block Devices (hard disks and disk-like devices)     over a Network. The libnbd is a userspace client library for writing NBD clients.

    Security Fix(es):

    * libnbd: NBD server improper certificate validation (CVE-2024-7383)

    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 version of libnbd installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-7383 advisory.

  - A flaw was found in libnbd. The client did not always correctly verify the NBD server's certificate when     using TLS to connect to an NBD server. This issue allows a man-in-the-middle attack on NBD traffic.
    (CVE-2024-7383)

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-2024:2813-1 advisory.

    - CVE-2024-7383: Fixed incorrect verification of a NBD server's certificate when using TLS to connect to     the server (bsc#1228872)

    Other fixes:
    - Update to version 1.18.5.

Tenable has extracted the preceding description block directly from the SUSE 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 openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2024:2789-1 advisory.

    - CVE-2024-7383: Fixed incorrect verification of a NBD server's certificate when using TLS to connect to     the server (bsc#1228872)

    Other fixes:
    - Update to version 1.18.5.

Tenable has extracted the preceding description block directly from the SUSE 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	Name	Product	Family	Severity
207929	Rocky Linux 9 : libnbd (RLSA-2024:6757)	Nessus	Rocky Linux Local Security Checks	high
207772	Oracle Linux 8 : virt:ol / and / virt-devel:rhel (ELSA-2024-6964)	Nessus	Oracle Linux Local Security Checks	high
207759	AlmaLinux 8 : virt:rhel and virt-devel:rhel (ALSA-2024:6964)	Nessus	Alma Linux Local Security Checks	high
207532	AlmaLinux 9 : libnbd (ALSA-2024:6757)	Nessus	Alma Linux Local Security Checks	high
207496	Oracle Linux 9 : libnbd (ELSA-2024-6757)	Nessus	Oracle Linux Local Security Checks	high
207394	RHEL 9 : libnbd (RHSA-2024:6757)	Nessus	Red Hat Local Security Checks	high
207012	CBL Mariner 2.0 Security Update: libnbd (CVE-2024-7383)	Nessus	MarinerOS Local Security Checks	high
205187	SUSE SLES15 / openSUSE 15 Security Update : libnbd (SUSE-SU-2024:2813-1)	Nessus	SuSE Local Security Checks	high
205128	openSUSE 15 Security Update : libnbd (SUSE-SU-2024:2789-1)	Nessus	SuSE Local Security Checks	high

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