CVE-2021-21707

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

29/11/2021

Last modified:

16/02/2023

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): None
Availability (A): None

Base Score 3.x

5.30

Severity 3.x

MEDIUM

Vector 2.0

AV:N/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:php:php::::::::	7.3.0 (including)	7.3.33 (excluding)
cpe:2.3:a:php:php::::::::	7.4.0 (including)	7.4.26 (excluding)
cpe:2.3:a:php:php::::::::	8.0.0 (including)	8.0.13 (excluding)
cpe:2.3:a:netapp:clustered_data_ontap:-:::::::*
cpe:2.3:o:debian:debian_linux:10.0:::::::*
cpe:2.3:o:debian:debian_linux:11.0:::::::*
cpe:2.3:a:tenable:tenable.sc::::::::		5.21.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-21707

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools