6.5

CVE-2021-3733

Exploit

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.

Data is provided by the National Vulnerability Database (NVD)
Python ≫ Python Version < 3.6.14
Python ≫ Python Version >= 3.7.0 < 3.7.11
Python ≫ Python Version >= 3.8.0 < 3.8.10
Python ≫ Python Version >= 3.9.0 < 3.9.5
Python ≫ Python Version3.10.0 Update-
Redhat ≫ Enterprise Linux Version8.0
Redhat ≫ Enterprise Linux Eus Version8.4
Fedoraproject ≫ Fedora Version33
Fedoraproject ≫ Fedora Version34
Fedoraproject ≫ Fedora Version35
Fedoraproject ≫ Fedora Version36
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.68% 0.707
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov 4 8 2.9
AV:N/AC:L/Au:S/C:N/I:N/A:P
CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

https://bugs.python.org/issue43075
Patch
Vendor Advisory
Exploit
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1995234
Third Party Advisory
Issue Tracking
https://ubuntu.com/security/CVE-2021-3733
Patch
Third Party Advisory