// For flags

CVE-2021-44040

HTTP request line fuzzing attacks

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

Improper Input Validation vulnerability in request line parsing of Apache Traffic Server allows an attacker to send invalid requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.3 and 9.0.0 to 9.1.1.

Una vulnerabilidad de comprobación de entrada inapropiada en el análisis de líneas de petición de Apache Traffic Server permite a un atacante enviar peticiones no válidas. Este problema afecta a Apache Traffic Server versiones 8.0.0 a 8.1.3 y versiones 9.0.0 a 9.1.1

*Credits: Apache Traffic Server would like to thank Bahruz Jabiyev, Steven Sprecher and Kaan Onarlioglu for reporting these issues. We used his tool t-reqs (https://github.com/bahruzjabiyev/t-reqs-http-fuzzer) for discovering them.
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
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-11-19 CVE Reserved
  • 2022-03-23 CVE Published
  • 2024-03-19 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
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"
 Traffic Server
Search vendor "Apache" for product "Traffic Server"
 >= 8.0.0 <= 8.1.3
Search vendor "Apache" for product "Traffic Server" and version " >= 8.0.0 <= 8.1.3"
-
Affected
Apache
Search vendor "Apache"
 Traffic Server
Search vendor "Apache" for product "Traffic Server"
 >= 9.0.0 <= 9.1.1
Search vendor "Apache" for product "Traffic Server" and version " >= 9.0.0 <= 9.1.1"
-
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
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 11.0
Search vendor "Debian" for product "Debian Linux" and version "11.0"
-
Affected