In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO, NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages.

The remote NewStart CGSL host, running version MAIN 6.06 (SP), has nbd packages installed that are affected by multiple vulnerabilities:

  - In nbd-server in nbd before 3.24, there is a stack-based buffer overflow. An attacker can cause a buffer     overflow in the parsing of the name field by sending a crafted NBD_OPT_INFO or NBD_OPT_GO message with an     large value as the length of the name. (CVE-2022-26496)

  - In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer     overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated     for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO,     NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages. (CVE-2022-26495)

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.

  - In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer     overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated     for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO,     NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages. (CVE-2022-26495)

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

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2022-e1ce6f6d88 advisory.

    Automatic update for nbd-3.24-1.fc37.

    ##### **Changelog**

    ```
    * Tue Mar  8 2022 Robin Lee <cheeselee@fedoraproject.org> 3.24-1
    - Update to 3.24: fix CVE-2022-26495(RHBZ#2061541),       CVE-2022-26496(RHBZ#2061542)

    ```

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 host is affected by the vulnerability described in GLSA-202402-10 (NBD Tools: Multiple Vulnerabilities)

  - In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer     overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated     for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO,     NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages. (CVE-2022-26495)

  - In nbd-server in nbd before 3.24, there is a stack-based buffer overflow. An attacker can cause a buffer     overflow in the parsing of the name field by sending a crafted NBD_OPT_INFO or NBD_OPT_GO message with an     large value as the length of the name. (CVE-2022-26496)

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 a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:1276-1 advisory.

  - In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer     overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated     for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO,     NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages. (CVE-2022-26495)

  - In nbd-server in nbd before 3.24, there is a stack-based buffer overflow. An attacker can cause a buffer     overflow in the parsing of the name field by sending a crafted NBD_OPT_INFO or NBD_OPT_GO message with an     large value as the length of the name. (CVE-2022-26496)

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

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5323-1 advisory.

    It was discovered that NBD incorrectly handled name length fields. A remote attacker could use this issue     to cause NBD to crash, resulting in a denial of service, or possibly execute arbitrary code.

Tenable has extracted the preceding description block directly from the Ubuntu 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 Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5100 advisory.

  - In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer     overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated     for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO,     NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages. (CVE-2022-26495)

  - In nbd-server in nbd before 3.24, there is a stack-based buffer overflow. An attacker can cause a buffer     overflow in the parsing of the name field by sending a crafted NBD_OPT_INFO or NBD_OPT_GO message with an     large value as the length of the name. (CVE-2022-26496)

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

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2944 advisory.

  - In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer     overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated     for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO,     NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages. (CVE-2022-26495)

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
301201	NewStart CGSL MAIN 6.06 (SP) : nbd Multiple Vulnerabilities (NS-SA-2026-0012)	Nessus	NewStart CGSL Local Security Checks	critical
255473	Linux Distros Unpatched Vulnerability : CVE-2022-26495	Nessus	Misc.	critical
211130	Fedora 37 : nbd (2022-e1ce6f6d88)	Nessus	Fedora Local Security Checks	critical
189978	GLSA-202402-10 : NBD Tools: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	critical
170211	openSUSE 15 Security Update : nbd (SUSE-SU-2022:1276-1)	Nessus	SuSE Local Security Checks	critical
158901	Ubuntu 18.04 LTS / 20.04 LTS : NBD vulnerabilities (USN-5323-1)	Nessus	Ubuntu Local Security Checks	critical
158898	Debian DSA-5100-1 : nbd - security update	Nessus	Debian Local Security Checks	critical
158821	Debian DLA-2944-1 : nbd - LTS security update	Nessus	Debian Local Security Checks	critical

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