// For flags

CVE-2022-39958

Response body bypass in OWASP ModSecurity Core Rule Set via repeated HTTP Range header submission with a small byte range

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by repeatedly submitting an HTTP Range header field with a small byte range. A restricted resource, access to which would ordinarily be detected, may be exfiltrated from the backend, despite being protected by a web application firewall that uses CRS. Short subsections of a restricted resource may bypass pattern matching techniques and allow undetected access. 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 to upgrade to 3.2.2 and 3.3.3 respectively and to configure a CRS paranoia level of 3 or higher.

OWASP ModSecurity Core Rule Set (CRS) esta afectado por una omisión del cuerpo de respuesta para exfiltrar secuencialmente secciones pequeñas e indetectables de datos mediante el envío repetido de un campo de encabezado HTTP Range con un pequeño rango de bytes. Un recurso restringido, cuyo acceso sería normalmente detectado, puede ser exfiltrado desde el backend, a pesar de estar protegido por un firewall de aplicaciones web que usa CRS. Las subsecciones cortas de un recurso restringido pueden omitir las técnicas de comparación de patrones y permitir un acceso no detectado. Las versiones heredadas de CRS 3.0.x y 3.1.x están afectadas, así como las versiones 3.2.1 y 3.3.2 actualmente soportadas. Es recomendado a integradores y usuarios actualizar a versiones 3.2.2 y 3.3.3 respectivamente y que configuren un nivel de paranoia de CRS de 3 o superior

*Credits: @hussein98d (Hussein Daher)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-09-05 CVE Reserved
  • 2022-09-20 CVE Published
  • 2024-04-12 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-116: Improper Encoding or Escaping of Output
  • CWE-863: Incorrect Authorization
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Owasp
Search vendor "Owasp"
 Owasp Modsecurity Core Rule Set
Search vendor "Owasp" for product "Owasp Modsecurity Core Rule Set"
 >= 3.0.0 < 3.2.2
Search vendor "Owasp" for product "Owasp Modsecurity Core Rule Set" and version " >= 3.0.0 < 3.2.2"
-
Affected
Owasp
Search vendor "Owasp"
 Owasp Modsecurity Core Rule Set
Search vendor "Owasp" for product "Owasp Modsecurity Core Rule Set"
 >= 3.3.0 < 3.3.3
Search vendor "Owasp" for product "Owasp Modsecurity Core Rule Set" and version " >= 3.3.0 < 3.3.3"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 35
Search vendor "Fedoraproject" for product "Fedora" and version "35"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 36
Search vendor "Fedoraproject" for product "Fedora" and version "36"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 37
Search vendor "Fedoraproject" for product "Fedora" and version "37"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 10.0
Search vendor "Debian" for product "Debian Linux" and version "10.0"
-
Affected