HTTP Request Smuggling

Affecting meinheld package, versions [,1.0.2)

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Overview

meinheld is a High performance asynchronous Python WSGI Web Server

Affected versions of this package are vulnerable to HTTP Request Smuggling. HTTP pipelining issues and request smuggling attacks might be possible due to incorrect Content-Length and Transfer encoding header parsing.

It is possible conduct HTTP request smuggling attacks by sending the Content-Length header twice. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own. Furthermore, invalid Transfer Encoding headers were found to be parsed as valid which could be leveraged for CL:TE or TE:CL smuggling attacks.

Remediation

Upgrade meinheld to version 1.0.2 or higher.

References

CVSS Score

8.2
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    Low
  • Availability
    None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C
Credit
Snyk Security Team
CVE
CVE-2020-7658
CWE
CWE-200
Snyk ID
SNYK-PYTHON-MEINHELD-569140
Disclosed
17 May, 2020
Published
21 May, 2020