Improper Input Validation Affecting php-common package, versions <0:7.4.27-1.amzn2022.0.3


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
25.32% (98th percentile)

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  • Snyk IDSNYK-AMZN2022-PHPCOMMON-2998805
  • published29 Aug 2022
  • disclosed29 Nov 2021

Introduced: 29 Nov 2021

CVE-2021-21707  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2022 php-common to version 0:7.4.27-1.amzn2022.0.3 or higher.
This issue was patched in ALAS2022-2022-073.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php-common package and not the php-common package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2022 relevant fixed versions and status.

In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.

CVSS Base Scores

version 3.1