The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2022-4339:01 advisory.

    * unbound: the novel ghost domain where malicious users to trigger continued resolvability of malicious     domain names (CVE-2022-30698)
      * unbound: novel ghost domain attack where malicious users to trigger continued resolvability of     malicious domain names (CVE-2022-30699)

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 FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the bc43a578-14ec-11ed-856e-d4c9ef517024 advisory.

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

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

According to the versions of the unbound packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the 'ghost domain     names' attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the 'ghost domain     names' attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2022:7622 advisory.

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

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

The remote Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2022:8062 advisory.

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

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

ID	名前	製品	ファミリー	公開日	更新日	深刻度
292694	MiracleLinux 8 : unbound-1.16.2-2.el8 (AXSA:2022-4339:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	medium
163892	FreeBSD : Unbound -- Multiple vulnerabilities (bc43a578-14ec-11ed-856e-d4c9ef517024)	Nessus	FreeBSD Local Security Checks	2022/8/6	2022/12/7	medium
165835	EulerOS 2.0 SP8 : unbound (EulerOS-SA-2022-2482)	Nessus	Huawei Local Security Checks	2022/10/9	2022/11/29	medium
166847	EulerOS 2.0 SP10 : unbound (EulerOS-SA-2022-2702)	Nessus	Huawei Local Security Checks	2022/11/2	2022/11/28	medium
167316	AlmaLinux 8 : unbound (ALSA-2022:7622)	Nessus	Alma Linux Local Security Checks	2022/11/12	2022/11/24	medium
184716	Rocky Linux 9 : unbound (RLSA-2022:8062)	Nessus	Rocky Linux Local Security Checks	2023/11/6	2023/11/6	medium

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