USN-5199-1: Python vulnerabilities

23936

17 March 2022

17 March 2022

CLOSED

MEDIUM

CVE-2021-3733,CVE-2021-3737

Severity

medium

Vendor

VMware Tanzu

Versions Affected

  • Canonical Ubuntu 18.04

Description

It was discovered that the urllib.request.AbstractBasicAuthHandler class in Python contains regex with a quadratic worst-case time complexity. Specially crafted traffic from a malicious HTTP server could cause a regular expression denial of service (ReDoS) condition for a client. (CVE-2021-3733) It was discovered that the Python urllib http client could enter into an infinite loop when incorrectly handling certain server responses (100 Continue response). Specially crafted traffic from a malicious HTTP server could cause a denial of service (DoS) condition for a client. (CVE-2021-3737)

CVEs contained in this USN include: CVE-2021-3733, CVE-2021-3737

Affected VMware Products and Versions

Severity is medium unless otherwise noted.

  • Platform Automation Toolkit
    • 4.4.x versions prior to 4.4.27
    • 5.0.x versions prior to 5.0.20
  • Isolation Segment
    • 2.7.x versions prior to 2.7.41
    • 2.10.x versions prior to 2.10.21
    • 2.11.x versions prior to 2.11.10
    • 2.12.x versions prior to 2.12.4
  • VMware Tanzu Application Service for VMs
    • 2.7.x versions prior to 2.7.46
    • 2.10.x versions prior to 2.10.26
    • 2.11.x versions prior to 2.11.14
    • 2.12.x versions prior to 2.12.7

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. On the Tanzu Network product page for each release, check the Depends On section and/or Release Notes for this information. Releases that have fixed this issue include:
  • Platform Automation Toolkit
    • 4.4.27
    • 5.0.20
  • Isolation Segment
    • 2.7.41
    • 2.10.21
    • 2.11.10
    • 2.12.4
  • VMware Tanzu Application Service for VMs
    • 2.7.46
    • 2.10.26
    • 2.11.14
    • 2.12.7

References

History

2022-03-17: Initial vulnerability report published.