StackPatch is liveSee product

Back to CVE digest
CVE-2021-39214 · cross-distro fix matrix

CVE-2021-39214: 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 ano

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-39214 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

  • mitmproxy→ fixed in8.1.1-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y mitmproxy

Alpine v3.21

Source: Alpine secdb

  • mitmproxy→ fixed in7.0.3-r0
    apk update && apk add --upgrade mitmproxy

Alpine edge

Source: Alpine secdb

  • mitmproxy→ fixed in7.0.3-r0
    apk update && apk add --upgrade mitmproxy
Are YOU affected by CVE-2021-39214?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash
Continuous monitoring beats manual checking

CVE-2021-39214dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)