| Name | CVE-2021-33880 |
| Description | The aaugustin websockets library before 9.1 for Python has an Observable Timing Discrepancy on servers when HTTP Basic Authentication is enabled with basic_auth_protocol_factory(credentials=...). An attacker may be able to guess a password via a timing attack. |
| 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 | 989561 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| python-websockets (PTS) | stretch | 3.2-2 | fixed |
| buster | 7.0-1 | fixed |
| bullseye | 8.1-1+deb11u1 | fixed |
| sid, trixie, bookworm | 10.4-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[buster] - python-websockets <not-affected> (Vulnerable code introduced in 8.0)
[stretch] - python-websockets <not-affected> (Vulnerable code introduced in 8.0)
https://github.com/aaugustin/websockets/commit/547a26b685d08cac0aa64e5e65f7867ac0ea9bc0