CVE-2021-39214 Common Vulnerabilities and Exposures

Upstream information

CVE-2021-39214 at MITRE

Description

mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.2 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response's HTTP message body. While a smuggled request is still captured as part of another request's body, it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless one uses mitmproxy to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 7.0.3 and above.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail	National Vulnerability Database
Base Score	8.1
Vector	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality Impact	High
Integrity Impact	High
Availability Impact	High
CVSSv3 Version	3.1

SUSE Bugzilla entry: 1190603 [IN_PROGRESS]

SUSE Security Advisories:

openSUSE-SU-2023:0232-1, published Sun Aug 20 16:44:34 2023
openSUSE-SU-2023:0233-1, published Sun Aug 20 16:44:34 2023

List of released packages

Product(s)	Fixed package version(s)	References
SUSE Package Hub 15 SP4	`python3-mitmproxy >= 3.0.4-bp154.2.3.1`	Patchnames: openSUSE-2023-232
SUSE Package Hub 15 SP5	`python3-mitmproxy >= 3.0.4-bp155.3.3.1`	Patchnames: openSUSE-2023-233
openSUSE Leap 15.4	`python3-mitmproxy >= 3.0.4-bp154.2.3.1`	Patchnames: openSUSE-2023-232
openSUSE Leap 15.5	`python3-mitmproxy >= 3.0.4-bp155.3.3.1`	Patchnames: openSUSE-2023-233

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s)	Source package	State
Products past their end of life and not receiving proactive updates anymore.
SUSE Package Hub 15 SP4	python-mitmproxy	Released
SUSE Package Hub 15 SP5	python-mitmproxy	Released

SUSE Timeline for this CVE

CVE page created: Thu Sep 16 22:00:45 2021
CVE page last modified: Thu Dec 11 16:59:45 2025