Vulnerability · Published Mar 21, 2022 · Assigned by GitHub_M
CVE-2022-24766Insufficient Protection against HTTP Request Smuggling in mitmproxy
Critical 9.8
In plain English
A critical-severity security flaw in mitmproxy from mitmproxy. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
mitmproxy is an interactive, SSL/TLS-capable intercepting proxy. In mitmproxy 7.0.4 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 mitmproxy would only see one request, the target server would see multiple requests. A smuggled request is still captured as part of another request's body, but 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 mitmproxy is used to protect an HTTP/1 service, no action is required. The vulnerability has been fixed in mitmproxy 8.0.0 and above. There are currently no known workarounds.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mitmproxy | 8.1.1-1 | DEBIAN-CVE-2022-24766 |
| Debian:14 | mitmproxy | 8.1.1-1 | DEBIAN-CVE-2022-24766 |
| PyPI | mitmproxy | 8.0.0 | GHSA-gcx2-gvj7-pxv3 |
| PyPI | mitmproxy | 8.0.0 | PYSEC-2022-170 |
| Ubuntu:22.04:LTS | mitmproxy | no fix listed | UBUNTU-CVE-2022-24766 |
| Ubuntu:24.04:LTS | mitmproxy | no fix listed | UBUNTU-CVE-2022-24766 |
| Ubuntu:25.10 | mitmproxy | no fix listed | UBUNTU-CVE-2022-24766 |
| Ubuntu:26.04:LTS | mitmproxy | no fix listed | UBUNTU-CVE-2022-24766 |
| Ubuntu:26.10 | mitmproxy | no fix listed | UBUNTU-CVE-2022-24766 |
Affected products (as reported)
Weakness: CWE-444 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/mitmproxy/mitmproxy/security/advisories/GHSA-gcx2-gvj7-pxv3 x_refsource_CONFIRM
- https://github.com/mitmproxy/mitmproxy/commit/b06fb6d157087d526bd02e7aadbe37c56865c71b x_refsource_MISC
- https://mitmproxy.org/posts/releases/mitmproxy8/ x_refsource_MISC