Search criteria
23 vulnerabilities found for modsecurity by owasp
CVE-2025-54571 (GCVE-0-2025-54571)
Vulnerability from nvd – Published: 2025-08-05 23:39 – Updated: 2025-11-03 18:13
VLAI?
Title
ModSecurity's Insufficient Return Value Handling can Lead to XSS and Source Code Disclosure
Summary
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.11
and below, an attacker can override the HTTP response’s Content-Type, which could lead to several issues depending on the HTTP scenario. For example, we have demonstrated the potential for XSS and arbitrary script source code disclosure in the latest version of mod_security2. This issue is fixed in version 2.9.12.
Severity ?
CWE
- CWE-252 - Unchecked Return Value
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| owasp-modsecurity | ModSecurity |
Affected:
< 2.9.12
|
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CVE-2025-48866 (GCVE-0-2025-48866)
Vulnerability from nvd – Published: 2025-06-02 15:46 – Updated: 2025-06-09 15:03
VLAI?
Title
ModSecurity has possible DoS vulnerability in sanitiseArg action
Summary
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions prior to 2.9.10 contain a denial of service vulnerability similar to GHSA-859r-vvv8-rm8r/CVE-2025-47947. The `sanitiseArg` (and `sanitizeArg` - this is the same action but an alias) is vulnerable to adding an excessive number of arguments, thereby leading to denial of service. Version 2.9.10 fixes the issue. As a workaround, avoid using rules that contain the `sanitiseArg` (or `sanitizeArg`) action.
Severity ?
7.5 (High)
CWE
- CWE-1050 - Excessive Platform Resource Consumption within a Loop
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| owasp-modsecurity | ModSecurity |
Affected:
< 2.9.10
|
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CVE-2024-1019 (GCVE-0-2024-1019)
Vulnerability from nvd – Published: 2024-01-30 16:09 – Updated: 2025-06-17 21:29
VLAI?
Title
WAF bypass of the ModSecurity v3 release line
Summary
ModSecurity / libModSecurity 3.0.0 to 3.0.11 is affected by a WAF bypass for path-based payloads submitted via specially crafted request URLs. ModSecurity v3 decodes percent-encoded characters present in request URLs before it separates the URL path component from the optional query string component. This results in an impedance mismatch versus RFC compliant back-end applications. The vulnerability hides an attack payload in the path component of the URL from WAF rules inspecting it. A back-end may be vulnerable if it uses the path component of request URLs to construct queries. Integrators and users are advised to upgrade to 3.0.12. The ModSecurity v2 release line is not affected by this vulnerability.
Severity ?
8.6 (High)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| OWASP ModSecurity | ModSecurity |
Affected:
3.0.0 , ≤ 3.0.11
(patch)
|
Credits
Andrea Menin @AndreaTheMiddle <https://github.com/theMiddleBlue>
Matteo Pace @M4tteoP <https://github.com/M4tteoP>
Max Leske <https://github.com/theseion>
Ervin Hegedüs @airween <https://github.com/airween>
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CVE-2023-38285 (GCVE-0-2023-38285)
Vulnerability from nvd – Published: 2023-07-26 00:00 – Updated: 2024-10-23 15:42
VLAI?
Summary
Trustwave ModSecurity 3.x before 3.0.10 has Inefficient Algorithmic Complexity.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-28882 (GCVE-0-2023-28882)
Vulnerability from nvd – Published: 2023-04-28 00:00 – Updated: 2025-01-30 20:42
VLAI?
Summary
Trustwave ModSecurity 3.0.5 through 3.0.8 before 3.0.9 allows a denial of service (worker crash and unresponsiveness) because some inputs cause a segfault in the Transaction class for some configurations.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2022-48279 (GCVE-0-2022-48279)
Vulnerability from nvd – Published: 2023-01-20 00:00 – Updated: 2025-04-03 18:43
VLAI?
Summary
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2021-42717 (GCVE-0-2021-42717)
Vulnerability from nvd – Published: 2021-12-07 21:08 – Updated: 2024-08-04 03:38
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2019-25043 (GCVE-0-2019-25043)
Vulnerability from nvd – Published: 2021-05-06 16:32 – Updated: 2024-08-05 03:00
VLAI?
Summary
ModSecurity 3.x before 3.0.4 mishandles key-value pair parsing, as demonstrated by a "string index out of range" error and worker-process crash for a "Cookie: =abc" header.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
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CVE-2020-15598 (GCVE-0-2020-15598)
Vulnerability from nvd – Published: 2020-10-06 13:38 – Updated: 2024-08-04 13:22 Disputed
VLAI?
Summary
Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request. NOTE: The discoverer reports "Trustwave has signaled they are disputing our claims." The CVE suggests that there is a security issue with how ModSecurity handles regular expressions that can result in a Denial of Service condition. The vendor does not consider this as a security issue because1) there is no default configuration issue here. An attacker would need to know that a rule using a potentially problematic regular expression was in place, 2) the attacker would need to know the basic nature of the regular expression itself to exploit any resource issues. It's well known that regular expression usage can be taxing on system resources regardless of the use case. It is up to the administrator to decide on when it is appropriate to trade resources for potential security benefit
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2019-19886 (GCVE-0-2019-19886)
Vulnerability from nvd – Published: 2020-01-21 21:59 – Updated: 2024-08-05 02:32
VLAI?
Summary
Trustwave ModSecurity 3.0.0 through 3.0.3 allows an attacker to send crafted requests that may, when sent quickly in large volumes, lead to the server becoming slow or unresponsive (Denial of Service) because of a flaw in Transaction::addRequestHeader in transaction.cc.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2018-13065 (GCVE-0-2018-13065)
Vulnerability from nvd – Published: 2018-07-03 11:00 – Updated: 2024-08-05 08:52 Disputed
VLAI?
Summary
ModSecurity 3.0.0 has XSS via an onerror attribute of an IMG element. NOTE: a third party has disputed this issue because it may only apply to environments without a Core Rule Set configured
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2025-54571 (GCVE-0-2025-54571)
Vulnerability from cvelistv5 – Published: 2025-08-05 23:39 – Updated: 2025-11-03 18:13
VLAI?
Title
ModSecurity's Insufficient Return Value Handling can Lead to XSS and Source Code Disclosure
Summary
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.11
and below, an attacker can override the HTTP response’s Content-Type, which could lead to several issues depending on the HTTP scenario. For example, we have demonstrated the potential for XSS and arbitrary script source code disclosure in the latest version of mod_security2. This issue is fixed in version 2.9.12.
Severity ?
CWE
- CWE-252 - Unchecked Return Value
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| owasp-modsecurity | ModSecurity |
Affected:
< 2.9.12
|
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CVE-2025-48866 (GCVE-0-2025-48866)
Vulnerability from cvelistv5 – Published: 2025-06-02 15:46 – Updated: 2025-06-09 15:03
VLAI?
Title
ModSecurity has possible DoS vulnerability in sanitiseArg action
Summary
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions prior to 2.9.10 contain a denial of service vulnerability similar to GHSA-859r-vvv8-rm8r/CVE-2025-47947. The `sanitiseArg` (and `sanitizeArg` - this is the same action but an alias) is vulnerable to adding an excessive number of arguments, thereby leading to denial of service. Version 2.9.10 fixes the issue. As a workaround, avoid using rules that contain the `sanitiseArg` (or `sanitizeArg`) action.
Severity ?
7.5 (High)
CWE
- CWE-1050 - Excessive Platform Resource Consumption within a Loop
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| owasp-modsecurity | ModSecurity |
Affected:
< 2.9.10
|
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CVE-2024-1019 (GCVE-0-2024-1019)
Vulnerability from cvelistv5 – Published: 2024-01-30 16:09 – Updated: 2025-06-17 21:29
VLAI?
Title
WAF bypass of the ModSecurity v3 release line
Summary
ModSecurity / libModSecurity 3.0.0 to 3.0.11 is affected by a WAF bypass for path-based payloads submitted via specially crafted request URLs. ModSecurity v3 decodes percent-encoded characters present in request URLs before it separates the URL path component from the optional query string component. This results in an impedance mismatch versus RFC compliant back-end applications. The vulnerability hides an attack payload in the path component of the URL from WAF rules inspecting it. A back-end may be vulnerable if it uses the path component of request URLs to construct queries. Integrators and users are advised to upgrade to 3.0.12. The ModSecurity v2 release line is not affected by this vulnerability.
Severity ?
8.6 (High)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| OWASP ModSecurity | ModSecurity |
Affected:
3.0.0 , ≤ 3.0.11
(patch)
|
Credits
Andrea Menin @AndreaTheMiddle <https://github.com/theMiddleBlue>
Matteo Pace @M4tteoP <https://github.com/M4tteoP>
Max Leske <https://github.com/theseion>
Ervin Hegedüs @airween <https://github.com/airween>
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CVE-2023-38285 (GCVE-0-2023-38285)
Vulnerability from cvelistv5 – Published: 2023-07-26 00:00 – Updated: 2024-10-23 15:42
VLAI?
Summary
Trustwave ModSecurity 3.x before 3.0.10 has Inefficient Algorithmic Complexity.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-28882 (GCVE-0-2023-28882)
Vulnerability from cvelistv5 – Published: 2023-04-28 00:00 – Updated: 2025-01-30 20:42
VLAI?
Summary
Trustwave ModSecurity 3.0.5 through 3.0.8 before 3.0.9 allows a denial of service (worker crash and unresponsiveness) because some inputs cause a segfault in the Transaction class for some configurations.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2022-48279 (GCVE-0-2022-48279)
Vulnerability from cvelistv5 – Published: 2023-01-20 00:00 – Updated: 2025-04-03 18:43
VLAI?
Summary
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2021-42717 (GCVE-0-2021-42717)
Vulnerability from cvelistv5 – Published: 2021-12-07 21:08 – Updated: 2024-08-04 03:38
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2019-25043 (GCVE-0-2019-25043)
Vulnerability from cvelistv5 – Published: 2021-05-06 16:32 – Updated: 2024-08-05 03:00
VLAI?
Summary
ModSecurity 3.x before 3.0.4 mishandles key-value pair parsing, as demonstrated by a "string index out of range" error and worker-process crash for a "Cookie: =abc" header.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
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CVE-2020-15598 (GCVE-0-2020-15598)
Vulnerability from cvelistv5 – Published: 2020-10-06 13:38 – Updated: 2024-08-04 13:22 Disputed
VLAI?
Summary
Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request. NOTE: The discoverer reports "Trustwave has signaled they are disputing our claims." The CVE suggests that there is a security issue with how ModSecurity handles regular expressions that can result in a Denial of Service condition. The vendor does not consider this as a security issue because1) there is no default configuration issue here. An attacker would need to know that a rule using a potentially problematic regular expression was in place, 2) the attacker would need to know the basic nature of the regular expression itself to exploit any resource issues. It's well known that regular expression usage can be taxing on system resources regardless of the use case. It is up to the administrator to decide on when it is appropriate to trade resources for potential security benefit
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2019-19886 (GCVE-0-2019-19886)
Vulnerability from cvelistv5 – Published: 2020-01-21 21:59 – Updated: 2024-08-05 02:32
VLAI?
Summary
Trustwave ModSecurity 3.0.0 through 3.0.3 allows an attacker to send crafted requests that may, when sent quickly in large volumes, lead to the server becoming slow or unresponsive (Denial of Service) because of a flaw in Transaction::addRequestHeader in transaction.cc.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2018-13065 (GCVE-0-2018-13065)
Vulnerability from cvelistv5 – Published: 2018-07-03 11:00 – Updated: 2024-08-05 08:52 Disputed
VLAI?
Summary
ModSecurity 3.0.0 has XSS via an onerror attribute of an IMG element. NOTE: a third party has disputed this issue because it may only apply to environments without a Core Rule Set configured
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
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VAR-202112-0385
Vulnerability from variot - Updated: 2025-07-04 19:42ModSecurity 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. ModSecurity Exists in a recursive control vulnerability.Service operation interruption (DoS) It may be in a state. ModSecurity is an intrusion detection and prevention engine that can run as a module of the Apache web server or as a separate application to enhance the security of web applications and protect web applications from known and unknown attacks. The update introduces a new 'SecRequestBodyJsonDepthLimit' option to limit the maximum request body JSON parsing depth which ModSecurity will accept (defaults to 10000).
For the oldstable distribution (buster), this problem has been fixed in version 2.9.3-1+deb10u1.
For the stable distribution (bullseye), this problem has been fixed in version 2.9.3-3+deb11u1.
We recommend that you upgrade your modsecurity-apache packages.
For the detailed security status of modsecurity-apache please refer to its security tracker page at: https://security-tracker.debian.org/tracker/modsecurity-apache
Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE-----
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modsecurity-apache vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS (Available with Ubuntu Pro)
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)
Summary:
Several security issues were fixed in ModSecurity.
Software Description: - modsecurity-apache: Tighten web applications security for Apache
Details:
It was discovered that ModSecurity incorrectly handled certain nested JSON objects. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-42717)
It was discovered that ModSecurity incorrectly handled certain HTTP multipart requests. A remote attacker could possibly use this issue to bypass ModSecurity restrictions. (CVE-2022-48279)
It was discovered that ModSecurity incorrectly handled certain file uploads. A remote attacker could possibly use this issue to cause a buffer overflow and a firewall failure. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-24021)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04 LTS (Available with Ubuntu Pro): libapache2-mod-security2 2.9.5-1ubuntu0.1~esm1
Ubuntu 20.04 LTS: libapache2-mod-security2 2.9.3-1ubuntu0.1
Ubuntu 18.04 LTS (Available with Ubuntu Pro): libapache2-mod-security2 2.9.2-1ubuntu0.1~esm1
Ubuntu 16.04 LTS (Available with Ubuntu Pro): libapache2-mod-security2 2.9.0-1ubuntu0.1~esm1 libapache2-modsecurity 2.9.0-1ubuntu0.1~esm1
Ubuntu 14.04 LTS (Available with Ubuntu Pro): libapache2-mod-security2 2.7.7-2ubuntu0.1~esm1 libapache2-modsecurity 2.7.7-2ubuntu0.1~esm1
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-6370-1 CVE-2021-42717, CVE-2022-48279, CVE-2023-24021
Package Information: https://launchpad.net/ubuntu/+source/modsecurity-apache/2.9.3-1ubuntu0.1
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"data": "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. ModSecurity Exists in a recursive control vulnerability.Service operation interruption (DoS) It may be in a state. ModSecurity is an intrusion detection and prevention engine that can run as a module of the Apache web server or as a separate application to enhance the security of web applications and protect web applications from known and unknown attacks. 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An attacker could possibly use this issue to cause a denial\nof service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS\nand Ubuntu 20.04 LTS. (CVE-2021-42717)\n\nIt was discovered that ModSecurity incorrectly handled certain HTTP\nmultipart requests. A remote attacker could possibly use this issue\nto bypass ModSecurity restrictions. (CVE-2022-48279)\n\nIt was discovered that ModSecurity incorrectly handled certain file\nuploads. A remote attacker could possibly use this issue to cause a\nbuffer overflow and a firewall failure. This issue only affected\nUbuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. \n(CVE-2023-24021)\n\nUpdate instructions:\n\nThe problem can be corrected by updating your system to the following\npackage versions:\n\nUbuntu 22.04 LTS (Available with Ubuntu Pro):\n libapache2-mod-security2 2.9.5-1ubuntu0.1~esm1\n\nUbuntu 20.04 LTS:\n libapache2-mod-security2 2.9.3-1ubuntu0.1\n\nUbuntu 18.04 LTS (Available with Ubuntu Pro):\n libapache2-mod-security2 2.9.2-1ubuntu0.1~esm1\n\nUbuntu 16.04 LTS (Available with Ubuntu Pro):\n libapache2-mod-security2 2.9.0-1ubuntu0.1~esm1\n libapache2-modsecurity 2.9.0-1ubuntu0.1~esm1\n\nUbuntu 14.04 LTS (Available with Ubuntu Pro):\n libapache2-mod-security2 2.7.7-2ubuntu0.1~esm1\n libapache2-modsecurity 2.7.7-2ubuntu0.1~esm1\n\nIn general, a standard system update will make all the necessary changes. \n\nReferences:\n https://ubuntu.com/security/notices/USN-6370-1\n CVE-2021-42717, CVE-2022-48279, CVE-2023-24021\n\nPackage Information:\n https://launchpad.net/ubuntu/+source/modsecurity-apache/2.9.3-1ubuntu0.1\n\n",
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