VDB
DEBIAN-CVE-2021-3733
DEBIAN-CVE-2021-3733
PUBLISHED
CVSS 6.5 MEDIUM
There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | pypy3 | 0, 0, 0 |
| Debian:11 | python2.7 | 2.7.18-12, 2.7.18-13, 2.7.18-13.1 |
| Debian:14 | pypy3 | 0, 0, 0 |
| Debian:11 | python3.9 | 0, 3.9.2-1, 3.9.2-1 |
| Debian:11 | pypy3 | 0, 0, 0 |
| Debian:13 | pypy3 | 0, 0, 0 |
Exploit Intelligence
- zephyr-crosstool-arm-grype.html (github-poc)
Timeline
- Mar 10, 2022 CVE Published
- Apr 28, 2026 CVE Updated