// For flags

CVE-2023-38522

Apache Traffic Server: Incomplete field name check allows request smuggling

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.

Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.

*Credits: Ben Kallus
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-07-18 CVE Reserved
  • 2024-07-26 CVE Published
  • 2024-08-13 CVE Updated
  • 2024-08-28 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
  • CWE-86: Improper Neutralization of Invalid Characters in Identifiers in Web Pages
  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC
References (1)
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache Software Foundation
Search vendor "Apache Software Foundation"
Apache Traffic Server
Search vendor "Apache Software Foundation" for product "Apache Traffic Server"
>= 8.0.0 <= 8.1.10
Search vendor "Apache Software Foundation" for product "Apache Traffic Server" and version " >= 8.0.0 <= 8.1.10"
en
Affected
Apache Software Foundation
Search vendor "Apache Software Foundation"
Apache Traffic Server
Search vendor "Apache Software Foundation" for product "Apache Traffic Server"
>= 9.0.0 <= 9.2.4
Search vendor "Apache Software Foundation" for product "Apache Traffic Server" and version " >= 9.0.0 <= 9.2.4"
en
Affected