CVE-2021-21707 Affecting php7.0 package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.17% (55th percentile)

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  • Snyk IDSNYK-DEBIAN9-PHP70-1932463
  • published27 Nov 2021
  • disclosed29 Nov 2021

Introduced: 27 Nov 2021

CVE-2021-21707  (opens in a new tab)

How to fix?

There is no fixed version for Debian:9 php7.0.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php7.0 package and not the php7.0 package as distributed by Debian. See How to fix? for Debian:9 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 Scores

version 3.1