Resource Exhaustion Affecting python27 package, versions <0:2.7.18-2.142.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.42% (75th percentile)

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  • Snyk IDSNYK-AMZN201803-PYTHON27-2866058
  • published10 Jun 2022
  • disclosed10 Mar 2022

Introduced: 10 Mar 2022

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

How to fix?

Upgrade Amazon-Linux:2018.03 python27 to version 0:2.7.18-2.142.amzn1 or higher.
This issue was patched in ALAS-2022-1593.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python27 package and not the python27 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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