Algorithmic Complexity Affecting python3.9 package, versions <0:3.9.14-1.el9_1.2


Severity

medium

    Threat Intelligence

    EPSS
    0.53% (78th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-ROCKY9-PYTHON39-5415559
  • published 22 Feb 2023
  • disclosed 9 Nov 2022

How to fix?

Upgrade Rocky-Linux:9 python3.9 to version 0:3.9.14-1.el9_1.2 or higher.
This issue was patched in RLSA-2023:0953.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.9 package and not the python3.9 package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname. For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16.

References

CVSS Scores

version 3.1
Expand this section

Snyk

7.5 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
Expand this section

NVD

7.5 high
Expand this section

SUSE

6.5 medium
Expand this section

Red Hat

7.5 high