CVE-2021-33880
Observable Timing Discrepancy in aaugustin websockets library
5.9
MEDIUM
CVSS 3.1
EPSS 0.31%
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.
How to fix CVE-2021-33880
To remediate CVE-2021-33880, upgrade the affected package to a fixed version below.
- —upgrade to 8.1-1+deb11u1 or later
- —upgrade to 9.1 or later
- —upgrade to 547a26b685d08cac0aa64e5e65f7867ac0ea9bc0 or later
Is CVE-2021-33880 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 8.1-1+deb11u1
- from 0, < 9.1
- from 0, < 547a26b685d08cac0aa64e5e65f7867ac0ea9bc0 | from 0, < 9.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |