// For flags

CVE-2022-42252

Apache Tomcat request smuggling via malformed content-length

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

If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.

Si Apache Tomcat 8.5.0 a 8.5.82, 9.0.0-M1 a 9.0.67, 10.0.0-M1 a 10.0.26 o 10.1.0-M1 a 10.1.0 se configuró para ignorar encabezados HTTP no válidos mediante la configuración de rechazarIllegalHeader a falso (el valor predeterminado solo para 8.5.x), Tomcat no rechazó una solicitud que contenía un encabezado Content-Length no válido, lo que hace posible un ataque de contrabando de solicitudes si Tomcat estaba ubicado detrás de un proxy inverso que tampoco rechazó la solicitud con el encabezado no válido.

A flaw was found in Apache Tomcat. If the server is configured to ignore invalid HTTP headers, the server does not reject a request containing an invalid content-length header, making it vulnerable to a request smuggling attack.

*Credits: Thanks to Sam Shahsavar who discovered this issue and reported it to the Apache Tomcat security team.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-10-03 CVE Reserved
  • 2022-11-01 CVE Published
  • 2024-06-08 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
 Tomcat
Search vendor "Apache" for product "Tomcat"
 >= 8.5.0 < 8.5.83
Search vendor "Apache" for product "Tomcat" and version " >= 8.5.0 < 8.5.83"
-
Affected
Apache
Search vendor "Apache"
 Tomcat
Search vendor "Apache" for product "Tomcat"
 >= 9.0.0 < 9.0.68
Search vendor "Apache" for product "Tomcat" and version " >= 9.0.0 < 9.0.68"
-
Affected
Apache
Search vendor "Apache"
 Tomcat
Search vendor "Apache" for product "Tomcat"
 >= 10.0.0 < 10.0.27
Search vendor "Apache" for product "Tomcat" and version " >= 10.0.0 < 10.0.27"
-
Affected
Apache
Search vendor "Apache"
 Tomcat
Search vendor "Apache" for product "Tomcat"
 >= 10.1.0 < 10.1.1
Search vendor "Apache" for product "Tomcat" and version " >= 10.1.0 < 10.1.1"
-
Affected