CVE-2021-21707
Medium
Description
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.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Php
PublishedNov 29, 2021
First seenNov 29, 2021
Weakness typeCWE-159CWE-159
How to fix
Update
- php php7.3.33, 7.4.26, 8.0.13 or later
- tenable tenable.sc5.21.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| php php | 7.3.0 ≤ v < 7.3.33, 7.4.0 ≤ v < 7.4.26, 8.0.0 ≤ v < 8.0.13 | 7.3.33, 7.4.26, 8.0.13 |
| netapp clustered_data_ontap | No range specified | — |
| debian debian_linux | 10.0, 11.0 | — |
| tenable tenable.sc | v < 5.21.0 | 5.21.0 |
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