| Name | CVE-2021-21419 |
| Description | Eventlet is a concurrent networking library for Python. A websocket peer may exhaust memory on Eventlet side by sending very large websocket frames. Malicious peer may exhaust memory on Eventlet side by sending highly compressed data frame. A patch in version 0.31.0 restricts websocket frame to reasonable limits. As a workaround, restricting memory usage via OS limits would help against overall machine exhaustion, but there is no workaround to protect Eventlet process. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 988342 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-eventlet (PTS) | bullseye | 0.26.1-7+deb11u1 | fixed |
| bullseye (security) | 0.26.1-7+deb11u2 | fixed | |
| bookworm | 0.33.1-4 | fixed | |
| trixie | 0.39.1-2 | fixed | |
| forky, sid | 0.40.1-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-eventlet | source | (unstable) | 0.26.1-7 | 988342 |
[buster] - python-eventlet <no-dsa> (Minor issue)
[stretch] - python-eventlet <no-dsa> (Minor issue)
https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2
Fixed by: https://github.com/eventlet/eventlet/commit/1412f5e4125b4313f815778a1acb4d3336efcd07
Issue present as well in versions before introduction of per-message-defalte extension
or compression extension support.
Patch for 0.20 by SuSE: https://bugzilla.suse.com/attachment.cgi?id=849402&action=diff