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cve[email protected]CVE-2023-38697
HistoryAug 04, 2023 - 6:15 p.m.

CVE-2023-38697

2023-08-0418:15:15
CWE-444
web.nvd.nist.gov
46
protocol-http1
http/1
desync
http request smuggling
firewall bypass
cve-2023-38697
nvd

5.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

4.8 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

27.8%

protocol-http1 provides a low-level implementation of the HTTP/1 protocol. RFC 9112 Section 7.1 defined the format of chunk size, chunk data and chunk extension. The value of Content-Length header should be a string of 0-9 digits, the chunk size should be a string of hex digits and should split from chunk data using CRLF, and the chunk extension shouldn’t contain any invisible character. However, Falcon has following behaviors while disobey the corresponding RFCs: accepting Content-Length header values that have + prefix, accepting Content-Length header values that written in hexadecimal with 0x prefix, accepting 0x and + prefixed chunk size, and accepting LF in chunk extension. This behavior can lead to desync when forwarding through multiple HTTP parsers, potentially results in HTTP request smuggling and firewall bypassing. This issue is fixed in protocol-http1 v0.15.1. There are no known workarounds.

Affected configurations

Vulners
NVD
Node
socketryprotocol-http1Range<0.15.1
VendorProductVersionCPE
socketryprotocol\-http1*cpe:2.3:a:socketry:protocol\-http1:*:*:*:*:*:*:*:*

CNA Affected

[
  {
    "vendor": "socketry",
    "product": "protocol-http1",
    "versions": [
      {
        "version": "< 0.15.1",
        "status": "affected"
      }
    ]
  }
]

5.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

4.8 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

27.8%