The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:0323 advisory.

    nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency,     performance, and low memory usage.

    The following packages have been upgraded to a later upstream version: nginx (1.20.1). (BZ#2031030)

    Security Fix(es):

    * nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name     (CVE-2021-23017)

    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 version of Oracle GoldenGate installed on the remote host is affected by the following vulnerabilities as noted in the January 2022 CPU advisory :

  - Vulnerability in Oracle GoldenGate (component: Build Request (Apache Xerces-C++)). The supported version that is     affected is Prior to 21.4.0.0.0. Difficult to exploit vulnerability allows unauthenticated attacker with network     access via HTTP to compromise Oracle GoldenGate. Successful attacks of this vulnerability can result in takeover of     Oracle GoldenGate. (CVE-2018-1311)

  - Vulnerability in Oracle GoldenGate (component: GG Market Place for Support (nginx)). The supported version that is     affected is Prior to 21.4.0.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network     access via UDP to compromise Oracle GoldenGate. Successful attacks of this vulnerability can result in unauthorized     creation, deletion or modification access to critical data or all Oracle GoldenGate accessible data as well as     unauthorized access to critical data or complete access to all Oracle GoldenGate accessible data and unauthorized     ability to cause a partial denial of service (partial DOS) of Oracle GoldenGate. (CVE-2021-23017)

  - Vulnerability in Oracle GoldenGate (component: Database (OCCI)). Supported versions that are affected are Prior to     21.5.0.0.220118, Prior to 19.1.0.0.220118 and Prior to 12.3.0.1. Difficult to exploit vulnerability allows     unauthenticated attacker with network access via Oracle Net to compromise Oracle GoldenGate. Successful attacks     require human interaction from a person other than the attacker and while the vulnerability is in Oracle GoldenGate,     attacks may significantly impact additional products. Successful attacks of this vulnerability can result in     takeover of Oracle GoldenGate. (CVE-2021-2351)

The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2021-2307:01 advisory.

    * nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name     (CVE-2021-23017)

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

  - A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP     packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or     potential other impact. (CVE-2021-23017)

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

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4967-1 advisory.

    Luis Merino, Markus Vervier, and Eric Sesterhenn discovered that nginx incorrectly handled responses to     the DNS resolver. A remote attacker could use this issue to cause nginx 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 this issue but has instead relied only on the application's self-reported version number.

This update for nginx fixes the following issues :

CVE-2021-23017: nginx DNS resolver off-by-one heap write (bsc#1186126)

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

The version of nginx installed on the remote host is prior to 1.18.0-1.43. It is, therefore, affected by a vulnerability as referenced in the ALAS-2021-1507 advisory.

    A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to     write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least     significant byte of next heap chunk metadata likely leading to a remote code execution in certain     circumstances. The highest threat from this vulnerability is to data confidentiality and integrity as well     as system availability. (CVE-2021-23017)

Tenable has extracted the preceding description block directly from the tested product 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 Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-2259 advisory.

    [1.18.0-3.1.0.1]
    - Remove Red Hat references [Orabug: 29498217]

    [1:1.18.0-3.1]
    - Resolves: #1963178 - CVE-2021-23017 nginx:1.18/nginx: Off-by-one in       ngx_resolver_copy() when labels are followed by a pointer to a root       domain name

Tenable has extracted the preceding description block directly from the Oracle 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 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:2278 advisory.

    nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency,     performance, and low memory usage.

    Security Fix(es):

    * nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name     (CVE-2021-23017)

    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 host is affected by the vulnerability described in GLSA-202105-38 (nginx: Remote code execution)

    It was discovered that nginx did not properly handle DNS responses when       &ldquo;resolver&rdquo; directive is used.
  Impact :

    A remote attacker, able to provide DNS responses to a nginx instance,       could cause the execution of arbitrary code with the privileges of the       process or a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

The version of nginx installed on the remote host is prior to 1.20.0-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2NGINX1-2023-003 advisory.

    A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to     write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least     significant byte of next heap chunk metadata likely leading to a remote code execution in certain     circumstances. The highest threat from this vulnerability is to data confidentiality and integrity as well     as system availability. (CVE-2021-23017)

Tenable has extracted the preceding description block directly from the tested product 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 Junos OS installed on the remote host is affected by multiple vulnerabilities as referenced in the JSA88135 advisory.

  - NGINX before 1.13.6 has a buffer overflow for years that exceed four digits, as demonstrated by a file     with a modification date in 1969 that causes an integer overflow (or a false modification date far in the     future), when encountered by the autoindex module. (CVE-2017-20005)

  - The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 allows remote attackers to cause a denial of     service (invalid pointer dereference and worker process crash) via a crafted UDP DNS response.
    (CVE-2016-0742)

  - Use-after-free vulnerability in the resolver in nginx 0.6.18 through 1.8.0 and 1.9.x before 1.9.10 allows     remote attackers to cause a denial of service (worker process crash) or possibly have unspecified other     impact via a crafted DNS response related to CNAME response processing. (CVE-2016-0746)

  - The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which     allows remote attackers to cause a denial of service (worker process resource consumption) via vectors     related to arbitrary name resolution. (CVE-2016-0747)

  - The nginx package before 1.6.2-5+deb8u3 on Debian jessie, the nginx packages before 1.4.6-1ubuntu3.6 on     Ubuntu 14.04 LTS, before 1.10.0-0ubuntu0.16.04.3 on Ubuntu 16.04 LTS, and before 1.10.1-0ubuntu1.1 on     Ubuntu 16.10, and the nginx ebuild before 1.10.2-r3 on Gentoo allow local users with access to the web     server user account to gain root privileges via a symlink attack on the error log. (CVE-2016-1247)

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

ID	Name	Product	Family	Published	Updated	Severity
157264	RHEL 8 : nginx:1.20 (RHSA-2022:0323)	Nessus	Red Hat Local Security Checks	1/31/2022	4/8/2025	high
168057	Oracle GoldenGate Multiple Vulnerabilities (January 2022 CPU)	Nessus	Misc.	11/22/2022	10/3/2023	high
294542	MiracleLinux 8 : nginx:1.16 (AXSA:2021-2307:01)	Nessus	Miracle Linux Local Security Checks	1/20/2026	1/20/2026	high
223665	Linux Distros Unpatched Vulnerability : CVE-2021-23017	Nessus	Misc.	3/4/2025	7/18/2026	high
149991	Ubuntu 18.04 LTS / 20.04 LTS : nginx vulnerability (USN-4967-1)	Nessus	Ubuntu Local Security Checks	5/27/2021	8/27/2024	high
150093	SUSE SLES15 Security Update : nginx (SUSE-SU-2021:1815-1)	Nessus	SuSE Local Security Checks	6/1/2021	3/23/2023	high
150150	Amazon Linux AMI : nginx (ALAS-2021-1507)	Nessus	Amazon Linux Local Security Checks	6/2/2021	12/11/2024	high
150349	Oracle Linux 8 : nginx:1.18 (ELSA-2021-2259)	Nessus	Oracle Linux Local Security Checks	6/8/2021	11/1/2024	high
150785	RHEL 7 : rh-nginx116-nginx (RHSA-2021:2278)	Nessus	Red Hat Local Security Checks	6/15/2021	11/7/2024	high
156987	GLSA-202105-38 : nginx: Remote code execution	Nessus	Gentoo Local Security Checks	1/24/2022	9/21/2022	high
181960	Amazon Linux 2 : nginx (ALASNGINX1-2023-003)	Nessus	Amazon Linux Local Security Checks	9/27/2023	12/11/2024	high
310760	Juniper Junos OS Multiple Vulnerabilities (JSA88135)	Nessus	Junos Local Security Checks	4/28/2026	4/30/2026	medium

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