Vulnerability Report

CVE-2023-40175

Title: HTTP Request Smuggling via Chunked Encoding / Content-Length Parsing

Request Smuggling

Proof Of Concept

No public PoC currently indexed for CVE-2023-40175.

CWE Category CWE-444
Published Date Aug 18, 2023
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 7.3 CVSS v3.1
Exploit Probability (EPSS)
0.38%

Vulnerability Summary

CVE-2023-40175: Puma is a Ruby/Rack web server built for parallelism. Prior to versions 6.3.1 and 5.6.7, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies and zero-length Content-Length headers in a way that allowed HTTP request smuggling. Severity of this issue is highly dependent on the nature of the web site using puma is. This could be caused by either incorrect parsing of trailing fields in chunked transfer encoding bodies or by parsing of blank/zero-length Content-Length headers. Both issues have been addressed and this vulnerability has been fixed in versions 6.3.1 and 5.6.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Impacted Vendors

P
psywerks 1
P
puma 1

Reference Links

https://github.com/puma/puma/commit/690155e7d644b80eeef0a6094f9826ee41f1080a https://github.com/puma/puma/security/advisories/GHSA-68xg-gqqm-vgj8 https://github.com/puma/puma/commit/690155e7d644b80eeef0a6094f9826ee41f1080a https://github.com/puma/puma/security/advisories/GHSA-68xg-gqqm-vgj8
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-40175 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected Stack

No specific products linked.