The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2025:0124 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2025-5994:
    A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching     resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS     support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to upstream     name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-     always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to     accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox     attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous     replies.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2025:13577 advisory.

    The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.

    Security Fix(es):

    * unbound: Unbound Cache poisoning (CVE-2025-5994)

    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.

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

    A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching     resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS     support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to upstream     name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-     always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to     accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox     attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous     replies.(CVE-2025-5994)

Tenable has extracted the preceding description block directly from the EulerOS unbound security advisory.

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

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

    A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching     resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS     support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to upstream     name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-     always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to     accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox     attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous     replies.(CVE-2025-5994)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization unbound 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 AHV installed on the remote host is prior to 10.0.1.4 / AHV-10.0.1.4. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-10.0.1.4 advisory.

  - There exists a vulnerability in SQLite versions before 3.50.2 where the number of aggregate terms could     exceed the number of columns available. This could lead to a memory corruption issue. We recommend     upgrading to version 3.50.2 or above. (CVE-2025-6965)

  - The regcomp function in the GNU C library version from 2.4 to 2.41 is subject to a double free if some     previous allocation fails. It can be accomplished either by a malloc failure or by using an interposed     malloc that injects random malloc failures. The double free can allow buffer manipulation depending of how     the regex is constructed. This issue affects all architectures and ABIs supported by the GNU C library.
    (CVE-2025-8058)

  - A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching     resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS     support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to upstream     name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-     always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to     accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox     attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous     replies. (CVE-2025-5994)

  - Perl threads have a working directory race condition where file operations may target unintended paths. If     a directory handle is open at thread creation, the process-wide current working directory is temporarily     changed in order to clone that handle for the new thread, which is visible from any third (or more) thread     already running. This may lead to unintended operations such as loading code or accessing files from     unexpected locations, which a local attacker may be able to exploit. The bug was introduced in commit     11a11ecf4bea72b17d250cfb43c897be1341861e and released in Perl version 5.13.6 (CVE-2025-40909)

  - In libxml2 before 2.13.8 and 2.14.x before 2.14.2, xmlSchemaIDCFillNodeTables in xmlschemas.c has a heap-     based buffer under-read. To exploit this, a crafted XML document must be validated against an XML schema     with certain identity constraints, or a crafted XML schema must be used. (CVE-2025-32415)

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 a vulnerability as referenced in the e27ee4fc-cdc9-45a1-8242-09898cdbdc91 advisory.

    sep@nlnetlabs.nl reports:
    A multi-vendor cache poisoning vulnerability named 'Rebirthday             Attack' has been discovered in caching resolvers that support             EDNS Client Subnet (ECS).  Unbound is also vulnerable when compiled             with ECS support, i.e., '--enable-subnet', AND configured             to send ECS information along with queries to upstream name servers,             i.e., at least one of the 'send-client-subnet',             'client-subnet-zone' or 'client-subnet-always-forward'             options is used.  Resolvers supporting ECS need to segregate outgoing             queries to accommodate for different outgoing ECS information.  This             re-opens up resolvers to a birthday paradox attack (Rebirthday             Attack) that tries to match the DNS transaction ID in order to cache             non-ECS poisonous replies.

Tenable has extracted the preceding description block directly from the FreeBSD 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 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2025:12929 advisory.

    The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.

    Security Fix(es):

    * unbound: Unbound Cache poisoning (CVE-2025-5994)

    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 Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2025:13576 advisory.

    The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.

    Security Fix(es):

    * unbound: Unbound Cache poisoning (CVE-2025-5994)

    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 MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2025-10641:06 advisory.

    * unbound: Unbound Cache poisoning (CVE-2025-5994)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 AHV installed on the remote host is prior to 10.3.0.2. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-10.3.0.2 advisory.

  - LZ4 before 1.9.2 has a heap-based buffer overflow in LZ4_write32 (related to LZ4_compress_destSize),     affecting applications that call LZ4_compress_fast with a large input. (This issue can also lead to data     corruption.) NOTE: the vendor states only a few specific / uncommon usages of the API are at risk.
    (CVE-2019-17543)

  - setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python     packages. A path traversal vulnerability in `PackageIndex` is present in setuptools prior to version     78.1.1. An attacker would be allowed to write files to arbitrary locations on the filesystem with the     permissions of the process running the Python code, which could escalate to remote code execution     depending on the context. Version 78.1.1 fixes the issue. (CVE-2025-47273)

  - A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under     certain circumstances when the XML schematron has the <sch:name path=.../> schema elements. This flaw     allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the     program's crash using libxml or other possible undefined behaviors. (CVE-2025-49794)

  - A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can     trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that     can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to     sensitive data being corrupted in memory. (CVE-2025-49796)

  - A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations     can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of     service when processing crafted input. (CVE-2025-6021)

Note that Nessus has not tested for these issues 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
243965	Alibaba Cloud Linux 3 : 0124: unbound (ALINUX3-SA-2025:0124)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/8/6	2025/8/6	high
247829	RHEL 8 : unbound (RHSA-2025:13577)	Nessus	Red Hat Local Security Checks	2025/8/11	2025/10/9	high
270055	EulerOS 2.0 SP11 : unbound (EulerOS-SA-2025-2250)	Nessus	Huawei Local Security Checks	2025/10/11	2025/10/11	high
271316	EulerOS 2.0 SP13 : unbound (EulerOS-SA-2025-2281)	Nessus	Huawei Local Security Checks	2025/10/24	2025/10/24	high
271329	EulerOS 2.0 SP13 : unbound (EulerOS-SA-2025-2313)	Nessus	Huawei Local Security Checks	2025/10/24	2025/10/24	high
279278	EulerOS Virtualization 2.13.0 : unbound (EulerOS-SA-2025-2602)	Nessus	Huawei Local Security Checks	2025/12/18	2025/12/18	high
266317	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-10.0.1.4)	Nessus	Misc.	2025/9/30	2026/7/15	high
242336	FreeBSD : unbound -- Cache poisoning via the ECS-enabled Rebirthday Attack (e27ee4fc-cdc9-45a1-8242-09898cdbdc91)	Nessus	FreeBSD Local Security Checks	2025/7/18	2025/7/18	high
243564	RHEL 8 : unbound (RHSA-2025:12929)	Nessus	Red Hat Local Security Checks	2025/8/5	2025/8/5	high
247833	RHEL 8 : unbound (RHSA-2025:13576)	Nessus	Red Hat Local Security Checks	2025/8/11	2025/10/9	high
274877	EulerOS 2.0 SP10 : unbound (EulerOS-SA-2025-2431)	Nessus	Huawei Local Security Checks	2025/11/12	2025/11/12	high
274942	EulerOS 2.0 SP10 : unbound (EulerOS-SA-2025-2403)	Nessus	Huawei Local Security Checks	2025/11/12	2025/11/12	high
274958	EulerOS 2.0 SP12 : unbound (EulerOS-SA-2025-2344)	Nessus	Huawei Local Security Checks	2025/11/12	2025/11/12	high
282742	MiracleLinux 9 : unbound-1.16.2-19.el9_6.1 (AXSA:2025-10641:06)	Nessus	Miracle Linux Local Security Checks	2026/1/13	2026/1/13	high
261687	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-10.3.0.2)	Nessus	Misc.	2025/9/8	2026/7/27	high

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