This update for unbound fixes the following issues :

  - CVE-2020-12662: Fixed an issue where unbound could have     been tricked into amplifying an incoming query into a     large number of queries directed to a target     (bsc#1171889).

  - CVE-2020-12663: Fixed an issue where malformed answers     from upstream name servers could have been used to make     unbound unresponsive (bsc#1171889).&#9; 

  - CVE-2019-18934: Fixed a vulnerability in the IPSec     module which could have allowed code execution after     receiving a special crafted answer (bsc#1157268).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

According to the version of the unbound package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - Unbound 1.6.4 through 1.9.4 contain a vulnerability in     the ipsec module that can cause shell code execution     after receiving a specially crafted answer. This issue     can only be triggered if unbound was compiled with     `--enable-ipsecmod` support, and ipsecmod is enabled     and used in the configuration.(CVE-2019-18934)

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.

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

  - Unbound 1.6.4 through 1.9.4 contain a vulnerability in     the ipsec module that can cause shell code execution     after receiving a specially crafted answer. This issue     can only be triggered if unbound was compiled with     `--enable-ipsecmod` support, and ipsecmod is enabled     and used in the configuration.(CVE-2019-18934)

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 Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:1716 advisory.

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

    Security Fix(es):

    * unbound: command injection with data coming from a specially crafted IPSECKEY answer (CVE-2019-18934)

    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 8.2 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 this issue but has instead relied only on the application's self-reported version number.

Fix for CVE-2019-18934 and misc other security items

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Unbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module that can cause shell code     execution after receiving a specially crafted answer. This issue can only be triggered if unbound was     compiled with `--enable-ipsecmod` support, and ipsecmod is enabled and used in the configuration.
    (CVE-2019-18934)

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

An update of the unbound package has been released.

The remote NewStart CGSL host, running version MAIN 6.01, has unbound packages installed that are affected by multiple vulnerabilities:

  - Unbound 1.6.4 through 1.9.4 contain a vulnerability in     the ipsec module that can cause shell code execution     after receiving a specially crafted answer. This issue     can only be triggered if unbound was compiled with     `--enable-ipsecmod` support, and ipsecmod is enabled and     used in the configuration. (CVE-2019-18934)

  - Unbound before 1.10.1 has an infinite loop via malformed     DNS answers received from upstream servers.
    (CVE-2020-12663)

  - Unbound before 1.10.1 has Insufficient Control of     Network Message Volume, aka an NXNSAttack issue. This     is triggered by random subdomains in the NSDNAME in NS     records. (CVE-2020-12662)

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 :

  - Unbound 1.6.4 through 1.9.4 contain a vulnerability in     the ipsec module that can cause shell code execution     after receiving a specially crafted answer. This issue     can only be triggered if unbound was compiled with     `--enable-ipsecmod` support, and ipsecmod is enabled     and used in the configuration.(CVE-2019-18934)

  - Unbound before 1.10.1 has Insufficient Control of     Network Message Volume, aka an 'NXNSAttack' issue. This     is triggered by random subdomains in the NSDNAME in NS     records.(CVE-2020-12662)

  - Unbound before 1.10.1 has an infinite loop via     malformed DNS answers received from upstream     servers.(CVE-2020-12663)

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 Rocky Linux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_0488 advisory.

    This advisory aggregates security fixes for the unbound SRPM in CIQ LTS 9.2. It addresses 12 CVEs:
    CVE-2011-4528, CVE-2014-8602, CVE-2019-16866, CVE-2023-50868, CVE-2020-12662, and 7 more.

Tenable has extracted the preceding description block directly from the CIQ 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 Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0102 advisory.

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

    CVE-2019-18934:
    Unbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module that can cause shell code     execution after receiving a specially crafted answer. This issue can only be triggered if unbound was     compiled with `--enable-ipsecmod` support, and ipsecmod is enabled and used in the configuration.

    CVE-2020-12662:
    Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an NXNSAttack issue. This     is triggered by random subdomains in the NSDNAME in NS records.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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.

Unbound Security Advisories :

Recent versions of Unbound contain a vulnerability that can cause shell code execution after receiving a specially crafted answer. This issue can only be triggered if unbound was compiled with
--enable-ipsecmod support, and ipsecmod is enabled and used in the configuration.

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_1369 advisory.

    This advisory aggregates security fixes for the unbound SRPM in CIQ LTS 9.6. It addresses 28 CVEs:
    CVE-2026-42534, CVE-2026-32792, CVE-2011-4528, CVE-2014-8602, CVE-2025-11411, and 23 more.

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

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
138719	openSUSE Security Update : unbound (openSUSE-2020-913)	Nessus	SuSE Local Security Checks	2020/7/20	2024/2/29	high
136260	EulerOS Virtualization for ARM 64 3.0.2.0 : unbound (EulerOS-SA-2020-1557)	Nessus	Huawei Local Security Checks	2020/5/1	2024/3/13	high
137036	EulerOS 2.0 SP5 : unbound (EulerOS-SA-2020-1618)	Nessus	Huawei Local Security Checks	2020/6/2	2024/3/8	high
143029	RHEL 8 : unbound (RHSA-2020:1716)	Nessus	Red Hat Local Security Checks	2020/11/18	2024/11/7	high
132118	Fedora 31 : unbound (2019-a29e620cd4)	Nessus	Fedora Local Security Checks	2019/12/18	2024/4/4	high
222836	Linux Distros Unpatched Vulnerability : CVE-2019-18934	Nessus	Misc.	2025/3/4	2026/7/24	high
333040	Photon OS 5.0: Unbound PHSA-2026-5.0-92-0943	Nessus	PhotonOS Local Security Checks	2026/8/6	2026/9/3	high
138770	NewStart CGSL MAIN 6.01 : unbound Multiple Vulnerabilities (NS-SA-2020-0037)	Nessus	NewStart CGSL Local Security Checks	2020/7/21	2024/2/29	high
142292	EulerOS 2.0 SP2 : unbound (EulerOS-SA-2020-2403)	Nessus	Huawei Local Security Checks	2020/11/3	2024/2/12	high
353828	Rocky Linux 9.2 [CIQ] Security Update: python3-unbound / python3-unbound-debuginfo / unbound / etc Multiple Vulnerabilities (ciqsa-2026_0488)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/12	high
236759	Alibaba Cloud Linux 3 : 0102: unbound (ALINUX3-SA-2022:0102)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	high
131264	FreeBSD : unbound -- parsing vulnerability (ffc80e58-0dcb-11ea-9673-4c72b94353b5)	Nessus	FreeBSD Local Security Checks	2019/11/25	2024/4/10	high
132409	Fedora 30 : unbound (2019-c7b5103d2a)	Nessus	Fedora Local Security Checks	2019/12/27	2024/4/2	high
134017	EulerOS 2.0 SP8 : unbound (EulerOS-SA-2020-1183)	Nessus	Huawei Local Security Checks	2020/2/25	2024/3/26	high
354372	Rocky Linux 9.6 [CIQ] Security Update: python3-unbound / python3-unbound-debuginfo / unbound / etc Multiple Vulnerabilities (ciqsa-2026_1369)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/12	high

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