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.
References
Link Resource
https://bugs.php.net/bug.php?id=79971 Exploit Issue Tracking Patch Release Notes Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00030.html Issue Tracking Mailing List
https://security.netapp.com/advisory/ntap-20211223-0005/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5082 Third Party Advisory
https://www.tenable.com/security/tns-2022-09 Patch Release Notes Third Party Advisory
History

No history.

cve-icon MITRE Information

Status: PUBLISHED

Assigner: php

Published: 2021-11-15T00:00:00

Updated: 2022-12-15T00:00:00

Reserved: 2021-01-04T00:00:00


Link: CVE-2021-21707

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2021-11-29T07:15:06.397

Modified: 2023-02-16T03:07:25.807


Link: CVE-2021-21707

JSON object: View

cve-icon Redhat Information

No data.