Resource Exhaustion Affecting python39:3.9/python39-pysocks package, versions <0:1.7.1-4.module+el8.4.0+9822+20bf1249


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.34% (73rd percentile)

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  • Snyk IDSNYK-RHEL8-PYTHON39-4095381
  • published1 Sept 2021
  • disclosed10 Aug 2021

Introduced: 10 Aug 2021

CVE-2021-3733  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade RHEL:8 python39:3.9/python39-pysocks to version 0:1.7.1-4.module+el8.4.0+9822+20bf1249 or higher.
This issue was patched in RHSA-2021:4160.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python39:3.9/python39-pysocks package and not the python39:3.9/python39-pysocks package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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.

CVSS Scores

version 3.1