Vulnerability · NVD

CVE-2021-3733

CVE-2021-3733, rated medium by the vendor: 3 tracked apps concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 6.5
Exploitation: 4.7 %
Tracked apps: 3
Still exposed: 0

Vendor bulletin scale : NVD CVSS pending Published on 2022-03-10

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.

Attack vector : Network No user interaction

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS 4.68% above median percentile 91.5%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Python 3.12 Windows winget:Python.Python.3.12

Affected <3.6.14 Fixed in 3.6.14 Latest tracked 3.12.10 patched
Python 3.13 Windows winget:Python.Python.3.13

Affected <3.6.14 Fixed in 3.6.14 Latest tracked 3.13.15 patched
Python 3.14 Windows winget:Python.Python.3.14

Affected <3.6.14 Fixed in 3.6.14 Latest tracked 3.14.7 patched

NVD references 20 distinct products for this CVE : only those tracked by Scout (mobile and desktop catalog apps) are listed above. Libraries, servers and out-of-scope products do not appear here. Full list on NVD ↗

Vulnerable CPE configurations (5)

Vendor	Product	Platform	Versions	CPE 2.3 URI
python	python All platforms (wildcard)	All platforms (wildcard)	<3.6.14	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.7.0 <3.7.11	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.8.0 <3.8.10	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.9.0 <3.9.5	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.10.0:-::::::

View on NVD ↗ Advisory · bugs.python.org Advisory · github.com Advisory · ubuntu.com

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