The version of httpd installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2020-35452 advisory.

  - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in     mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team     could create one, though some particular compiler and/or compilation option might make it possible, with     limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow     (CVE-2020-35452)

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

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2022:1915 advisory.

  - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in     mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team     could create one, though some particular compiler and/or compilation option might make it possible, with     limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow     (CVE-2020-35452)

  - A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead     to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.
    (CVE-2021-33193)

  - A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and     crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive). (CVE-2021-36160)

  - A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL     pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for     requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This     issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included). (CVE-2021-44224)

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

The remote MiracleLinux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2025-10561:05 advisory.

    * CVE-2020-35452: mod_auth_digest: Fix single zero byte stack overflow
    * CVE-2006-20001: mod_dav: out-of-bounds read/write     CVE(s):
    CVE-2020-35452     Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in     mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team     could create one, though some particular compiler and/or compilation option might make it possible, with     limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow     CVE-2006-20001     A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool     (heap) memory location beyond the header value sent. This could cause the process to crash. This issue     affects Apache HTTP Server 2.4.54 and earlier.

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.

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

  - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in     mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team     could create one, though some particular compiler and/or compilation option might make it possible, with     limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow     (CVE-2020-35452)

  - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can     cause a NULL pointer dereference and crash, leading to a possible Denial Of Service (CVE-2021-26690)

  - In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server     could cause a heap overflow (CVE-2021-26691)

  - Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'     (CVE-2021-30641)

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

  - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially     crafted Digest nonce can cause a stack overflow in     mod_auth_digest. There is no report of this overflow     being exploitable, nor the Apache HTTP Server team     could create one, though some particular compiler     and/or compilation option might make it possible, with     limited consequences anyway due to the size (a single     byte) and the value (zero byte) of the     overflow.(CVE-2020-35452)

  - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially     crafted Cookie header handled by mod_session can cause     a NULL pointer dereference and crash, leading to a     possible Denial Of Service(CVE-2021-26690)

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 host is affected by the vulnerability described in GLSA-202107-38 (Apache: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Apache. Please review       the CVE identifiers referenced below for details.
  Impact :

    Please review the referenced CVE identifiers for details.
  Workaround :

    There is no known workaround at this time.

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:2127-1 advisory.

  - Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer     dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers,     leading to a Denial of Service (CVE-2020-13950)

  - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in     mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team     could create one, though some particular compiler and/or compilation option might make it possible, with     limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow     (CVE-2020-35452)

  - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can     cause a NULL pointer dereference and crash, leading to a possible Denial Of Service (CVE-2021-26690)

  - In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server     could cause a heap overflow (CVE-2021-26691)

  - Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'     (CVE-2021-30641)

  - Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the     size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of     these restrictions and HTTP response is sent to the client with a status code indicating why the request     was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the     offending header was the very first one received or appeared in a a footer. This led to a NULL pointer     dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2     request is easy to craft and submit, this can be exploited to DoS the server. This issue affected     mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never     released. (CVE-2021-31618)

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

The remote SUSE Linux SLES11 / SLES_SAP11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:14749-1 advisory.

    - fixed CVE-2021-30641 [bsc#1187174]: MergeSlashes regression
    - fixed CVE-2020-35452 [bsc#1186922]: Single zero byte stack overflow in mod_auth_digest

Tenable has extracted the preceding description block directly from the SUSE 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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-1915 advisory.

    - Resolves: #2035030 - CVE-2021-44224 httpd:2.4/httpd: possible NULL dereference       or SSRF in forward proxy configurations

Tenable has extracted the preceding description block directly from the Oracle 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.

The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2025:0526 advisory.

    Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:

    CVE-2006-20001:
    A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool     (heap) memory location beyond the header value sent. This could cause the process to crash.

    This issue affects Apache HTTP Server 2.4.54 and earlier.

    CVE-2020-35452:
    Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in     mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team     could create one, though some particular compiler and/or compilation option might make it possible, with     limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow

    CVE-2021-26690:
    Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can     cause a NULL pointer dereference and crash, leading to a possible Denial Of Service

    CVE-2022-22719:
    A carefully crafted request body can cause a read to a random memory area which could cause the process to     crash. This issue affects Apache HTTP Server 2.4.52 and earlier.

    CVE-2022-22721:
    If LimitXMLRequestBody is set to allow request bodies larger than 350MB (defaults to 1M) on 32 bit systems     an integer overflow happens which later causes out of bounds writes. This issue affects Apache HTTP Server     2.4.52 and earlier.

    CVE-2022-23943:
    Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap     memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 version 2.4.52 and     prior versions.

    CVE-2022-28615:
    Apache HTTP Server 2.4.53 and earlier may crash or disclose information due to a read beyond bounds in     ap_strcmp_match() when provided with an extremely large input buffer. While no code distributed with the     server can be coerced into such a call, third-party modules or lua scripts that use ap_strcmp_match() may     hypothetically be affected.

    CVE-2022-29404:
    In Apache HTTP Server 2.4.53 and earlier, a malicious request to a lua script that calls r:parsebody(0)     may cause a denial of service due to no default limit on possible input size.

    CVE-2022-30556:
    Apache HTTP Server 2.4.53 and earlier may return lengths to applications calling r:wsread() that point     past the end of the storage allocated for the buffer.

    CVE-2022-31813:
    Apache HTTP Server 2.4.53 and earlier may not send the X-Forwarded-* headers to the origin server based on     client side Connection header hop-by-hop mechanism. This may be used to bypass IP based authentication on     the origin server/application.

    CVE-2022-36760:
    Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of     Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to.  This     issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.54 and prior versions.

    CVE-2023-31122:
    Out-of-bounds Read vulnerability in mod_macro of Apache HTTP Server.This issue affects Apache HTTP Server:
    through 2.4.57.

    CVE-2024-39573:
    Potential SSRF in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to cause unsafe     RewriteRules to unexpectedly setup URL's to be handled by mod_proxy.
    Users are recommended to upgrade to version 2.4.60, which fixes this issue.

    CVE-2022-26377:
    Inconsistent Interpretation of HTTP Requests (/'HTTP Request Smuggling/') vulnerability in mod_proxy_ajp     of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to.
    This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.53 and prior versions.

Tenable has extracted the preceding description block directly from the Tencent 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.

ID	Name	Product	Family	Published	Updated	Severity
172935	CBL Mariner 2.0 Security Update: httpd (CVE-2020-35452)	Nessus	MarinerOS Local Security Checks	3/20/2023	2/10/2025	high
184621	Rocky Linux 8 : httpd:2.4 (RLSA-2022:1915)	Nessus	Rocky Linux Local Security Checks	11/6/2023	11/6/2023	high
283287	MiracleLinux 7 : httpd-2.4.6-99.1.0.8.el7.AXS7 (AXSA:2025-10561:05)	Nessus	Miracle Linux Local Security Checks	1/13/2026	1/13/2026	high
155517	EulerOS Virtualization 2.9.0 : httpd (EulerOS-SA-2021-2779)	Nessus	Huawei Local Security Checks	11/17/2021	4/18/2022	critical
152332	EulerOS 2.0 SP8 : httpd (EulerOS-SA-2021-2298)	Nessus	Huawei Local Security Checks	8/9/2021	12/6/2023	high
156972	GLSA-202107-38 : Apache: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	1/24/2022	1/26/2022	critical
151694	openSUSE 15 Security Update : apache2 (openSUSE-SU-2021:2127-1)	Nessus	SuSE Local Security Checks	7/16/2021	9/24/2021	critical
150902	SUSE SLES11: apache2 / apache2-doc / apache2-example-pages / apache2-prefork / etc (SUSE-SU-2021:14749-1)	Nessus	SuSE Local Security Checks	6/21/2021	6/25/2026	high
161278	Oracle Linux 8 : httpd:2.4 (ELSA-2022-1915)	Nessus	Oracle Linux Local Security Checks	5/18/2022	11/1/2024	high
247826	TencentOS Server 2: httpd (TSSA-2025:0526)	Nessus	Tencent Local Security Checks	8/11/2025	12/4/2025	critical

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