CVE-2021-33880
Fixed in a distro release EPSS 2%
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.
Products: websockets_project websockets, oracle communications_cloud_native_core_policy, oracle communications_cloud_native_core_security_edge_protection_proxy, oracle communications_cloud_native_core_service_communication_proxy, oracle communications_cloud_native_core_unified_data_repository
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| PyPI | websockets | 9.1 |
| PyPI | websockets | 547a26b685d08cac0aa64e5e65f7867ac0ea9bc0 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Arch Linux | python-websockets | 9.1-1 |
| Debian 12 | python-websockets | 9.1-1 |
| Debian 13 | python-websockets | 9.1-1 |
| Debian 14 | python-websockets | 9.1-1 |
| Ubuntu 16.04 LTS | python-websockets | no fix |
| Ubuntu 18.04 LTS | python-websockets | no fix |
| Ubuntu 20.04 LTS | python-websockets | no fix |
| Ubuntu 22.04 LTS | python-websockets | no fix |
| Ubuntu 24.04 LTS | python-websockets | no fix |
| Ubuntu 25.10 | python-websockets | no fix |
| Ubuntu 26.04 LTS | python-websockets | no fix |
| Ubuntu 26.10 | python-websockets | no fix |