CVE-2021-21707

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 v3 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::

Configuration 2 (hide)

cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:o:debian:debian_linux:10.0:::::::*
	cpe:2.3:o:debian:debian_linux:11.0:::::::*

Configuration 4 (hide)

cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-11-29 07:15

Updated : 2023-02-16 03:07

NVD link : CVE-2021-21707

Mitre link : CVE-2021-21707

CVE.ORG link : CVE-2021-21707

JSON object : View

Products Affected

tenable

tenable.sc

debian

debian_linux

netapp

clustered_data_ontap

php

php

CWE

NVD-CWE-Other CWE-159

Improper Handling of Invalid Use of Special Elements

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