A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1778007485 advisory.

  - A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the     size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended     behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.
    (CVE-2023-5215)

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

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2024-7921:01 advisory.

    * libnbd: Malicious NBD server may crash libnbd (CVE-2023-5871)
      * libnbd: Crash or misbehaviour when NBD server returns an unexpected block size (CVE-2023-5215)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2024:0622 advisory.

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

    CVE-2023-5215:
    A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the     size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended     behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the
    size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended
    behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.
    (CVE-2023-5215)

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 libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the     size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended     behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.
    (CVE-2023-5215)

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

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-2023-5215 advisory.

  - A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the     size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended     behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.
    (CVE-2023-5215)

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 multiple vulnerabilities as referenced in the ELSA-2024-2204 advisory.

    - Fix assertion in ext-mode BLOCK_STATUS (CVE-2023-5871)       resolves: RHEL-15143

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 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:2204 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: Malicious NBD server may crash libnbd (CVE-2023-5871)

    * libnbd: Crash or misbehaviour when NBD server returns an unexpected block size (CVE-2023-5215)

    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 9.4 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 openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2023:4222-1 advisory.

  - A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the     size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended     behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.
    (CVE-2023-5215)

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	Type	Severity
362136	AlmaLinux 9.2 [TuxCare] Security Update: libnbd / libnbd-bash-completion / libnbd-devel / nbdfuse / etc (ALMALINUX9.2:CLSA-2026:1778007485)	Nessus	Alma Linux Local Security Checks	Local	medium
292088	MiracleLinux 9 : libnbd-1.18.1-3.el9 (AXSA:2024-7921:01)	Nessus	Miracle Linux Local Security Checks	Local	medium
240024	TencentOS Server 4: libnbd (TSSA-2024:0622)	Nessus	Tencent Local Security Checks	Local	medium
427625	Alpine: multiple libnbd packages: security update to 1.18.0-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	medium
427625	Alpine: multiple libnbd packages: security update to 1.18.0-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	medium
226297	Linux Distros Unpatched Vulnerability : CVE-2023-5215	Nessus	Misc.	Local	medium
201617	CBL Mariner 2.0 Security Update: libnbd (CVE-2023-5215)	Nessus	MarinerOS Local Security Checks	Local	medium
195057	Oracle Linux 9 : libnbd (ELSA-2024-2204)	Nessus	Oracle Linux Local Security Checks	Local	medium
194778	RHEL 9 : libnbd (RHSA-2024:2204)	Nessus	Red Hat Local Security Checks	Local	medium
183992	openSUSE 15 Security Update : libnbd (SUSE-SU-2023:4222-1)	Nessus	SuSE Local Security Checks	Local	medium

Detections

Analytics

CVE-2023-5215

medium

Tenable Plugins

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