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Improper Input Validation Affecting python-libs package, versions <0:2.7.18-1.amzn2.0.2

Severity

medium

    Threat Intelligence

    EPSS
    1.04% (84th percentile)

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  • Snyk ID SNYK-AMZN2-PYTHONLIBS-1683486
  • published 27 Sep 2021
  • disclosed 13 Jul 2020
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Introduced: 13 Jul 2020

CVE-2019-20907 Open this link in a new tab
CWE-20 Open this link in a new tab
CWE-835 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 python-libs to version 0:2.7.18-1.amzn2.0.2 or higher.
This issue was patched in ALAS2-2020-1483.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-libs package and not the python-libs package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

References

CVSS Scores

version 3.1
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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
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NVD

7.5 high
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SUSE

5.3 medium
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Red Hat

7.5 high