Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.

The versions of HTTP Server installed on the remote host are affected by multiple vulnerabilities as referenced in the April 2024 CPU advisory:

  - Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Plugins (BSAFE Crypto-J)).     Supported versions that are affected are 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows     unauthenticated attacker with network access via TLS to compromise Oracle HTTP Server. Successful attacks of this     vulnerability can result in takeover of Oracle HTTP Server. (CVE-2022-34381)

  - Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: SSL Module (ModSecurity)).     The supported version that is affected is 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated     attacker with network access via TLS to compromise Oracle HTTP Server. Successful attacks of this vulnerability     can result in unauthorized creation, deletion or modification access to critical data or all Oracle HTTP Server     accessible data. (CVE-2023-24021)

  - Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Third Party (Apache HTTP     Server)). The supported version that is affected is 12.2.1.4.0. Easily exploitable vulnerability allows     unauthenticated attacker with network access via HTTP to compromise Oracle HTTP Server. Successful attacks of this     vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of     Oracle HTTP Server. (CVE-2023-31122)


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

The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6370-1 advisory.

  - ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with     nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests.
    Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes     for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly     vulnerable: the affected versions include 2.8.0 through 2.9.4. (CVE-2021-42717)

  - In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and     could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered     independent changes to the ModSecurity (C language) codebase. (CVE-2022-48279)

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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

The remote Redhat Enterprise Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:4629 advisory.

  - Integer Overflow or Wraparound vulnerability in apr_encode functions of Apache Portable Runtime (APR)     allows an attacker to write beyond bounds of a buffer. This issue affects Apache Portable Runtime (APR)     version 1.7.0. (CVE-2022-24963)

  - 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-2022-36760)

  - Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated     early, resulting in some headers being incorporated into the response body. If the later headers have any     security purpose, they will not be interpreted by the client. (CVE-2022-37436)

  - In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and     could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered     independent changes to the ModSecurity (C language) codebase. (CVE-2022-48279)

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

  - HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache     HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can     truncate/split the response forwarded to the client. (CVE-2023-27522)

  - A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH     server's public key using a SHA 256 hash. When this check fails, libcurl would free the memory for the     fingerprint before it returns an error message containing the (now freed) hash. This flaw risks inserting     sensitive heap-based data into the error message that might be shown to users or otherwise get leaked and     revealed. (CVE-2023-28319)

  - An improper certificate validation vulnerability exists in curl <v8.1.0 in the way it supports matching of     wildcard patterns when listed as Subject Alternative Name in TLS server certificates. curl can be built     to use its own name matching function for TLS rather than one provided by a TLS library. This private     wildcard matching function would match IDN (International Domain Name) hosts incorrectly and could as a     result accept patterns that otherwise should mismatch. IDN hostnames are converted to puny code before     used for certificate checks. Puny coded names always start with `xn--` and should not be allowed to     pattern match, but the wildcard check in curl could still check for `x*`, which would match even though     the IDN name most likely contained nothing even resembling an `x`. (CVE-2023-28321)

  - An information disclosure vulnerability exists in curl <v8.1.0 when doing HTTP(S) transfers, libcurl might     erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data to send, even when the     `CURLOPT_POSTFIELDS` option has been set, if the same handle previously wasused to issue a `PUT` request     which used that callback. This flaw may surprise the application and cause it to misbehave and either send     off the wrong data or use memory after free or similar in the second transfer. The problem exists in the     logic for a reused handle when it is (expected to be) changed from a PUT to a POST. (CVE-2023-28322)

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

This Solaris system is missing necessary patches to address critical security updates :

The version of mod_security installed on the remote host is prior to 2.9.7-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2098 advisory.

  - In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and     could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered     independent changes to the ModSecurity (C language) codebase. (CVE-2022-48279)

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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 mod_security package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and     could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered     independent changes to the ModSecurity (C language) codebase. (CVE-2022-48279)

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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 Fedora 36 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-8aa264d5c5 advisory.

  - In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and     could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered     independent changes to the ModSecurity (C language) codebase. (CVE-2022-48279)

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-bc61f7a145 advisory.

  - In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and     could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered     independent changes to the ModSecurity (C language) codebase. (CVE-2022-48279)

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-09f0496e60 advisory.

  - In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and     could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered     independent changes to the ModSecurity (C language) codebase. (CVE-2022-48279)

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2023:0447-1 advisory.

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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 SLES15 / SLES_SAP15 / openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2023:0431-1 advisory.

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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

The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-3283 advisory.

  - The OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass for HTTP multipart     requests by submitting a payload that uses a character encoding scheme via the Content-Type or the     deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and inspected     by the web application firewall engine and the rule set. The multipart payload will therefore bypass     detection. A vulnerable backend that supports these encoding schemes can potentially be exploited. The     legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and     3.3.2. Integrators and users are advised upgrade to 3.2.2 and 3.3.3 respectively. The mitigation against     these vulnerabilities depends on the installation of the latest ModSecurity version (v2.9.6 / v3.0.8).
    (CVE-2022-39956)

  - In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and     could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered     independent changes to the ModSecurity (C language) codebase. (CVE-2022-48279)

  - Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application     Firewall bypasses and buffer overflows on the Web Application Firewall when executing rules that read the     FILES_TMP_CONTENT collection. (CVE-2023-24021)

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	Severity
193460	Oracle HTTP Server (April 2024 CPU)	Nessus	Web Servers	critical
181427	Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 ESM : ModSecurity vulnerabilities (USN-6370-1)	Nessus	Ubuntu Local Security Checks	high
179879	RHEL 7 / 8 : Red Hat JBoss Core Services Apache HTTP Server 2.4.57 (RHSA-2023:4629)	Nessus	Red Hat Local Security Checks	critical
178626	Oracle Solaris Critical Patch Update : jul2023_SRU11_4_58_144_3	Nessus	Solaris Local Security Checks	critical
177861	Amazon Linux 2 : mod_security (ALAS-2023-2098)	Nessus	Amazon Linux Local Security Checks	high
176993	EulerOS 2.0 SP5 : mod_security (EulerOS-SA-2023-2160)	Nessus	Huawei Local Security Checks	high
174651	Fedora 36 : mod_security (2023-8aa264d5c5)	Nessus	Fedora Local Security Checks	high
174647	Fedora 38 : mod_security (2023-bc61f7a145)	Nessus	Fedora Local Security Checks	high
174645	Fedora 37 : mod_security (2023-09f0496e60)	Nessus	Fedora Local Security Checks	high
174213	EulerOS 2.0 SP8 : mod_security (EulerOS-SA-2023-1601)	Nessus	Huawei Local Security Checks	high
171617	SUSE SLES15 Security Update : apache2-mod_security2 (SUSE-SU-2023:0447-1)	Nessus	SuSE Local Security Checks	high
171530	SUSE SLES15 / openSUSE 15 Security Update : apache2-mod_security2 (SUSE-SU-2023:0431-1)	Nessus	SuSE Local Security Checks	high
170697	Debian DLA-3283-1 : modsecurity-apache - LTS security update	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2023-24021

high

Tenable Plugins

critical

high

critical

critical

high

high

high

high

high

high

high

high

critical