CVE-2021-36172 : An improper restriction of XML external entity reference vulnerability in the pa

An improper restriction of XML external entity reference vulnerability in the parser of XML responses of FortiPortal before 6.0.6 may allow an attacker who controls the producer of XML reports consumed by FortiPortal to trigger a denial of service or read arbitrary files from the underlying file system by means of specifically crafted XML documents.

Published 2021-11-02 18:15:09

Updated 2021-11-04 13:19:24

Source Fortinet, Inc.

View at NVD, CVE.org

Vulnerability category: XML external entity (XXE) injectionDenial of service

Products affected by CVE-2021-36172

Fortinet » Fortiportal
Versions from including (>=) 6.0.0 and before (<) 6.0.6
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiportal
Versions from including (>=) 4.1.0 and up to, including, (<=) 4.1.2
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiportal
Versions from including (>=) 5.0.0 and up to, including, (<=) 5.0.3
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiportal
Versions from including (>=) 5.2.0 and up to, including, (<=) 5.2.6
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiportal
Versions from including (>=) 4.0.0 and up to, including, (<=) 4.0.4
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiportal
Versions from including (>=) 4.2.0 and up to, including, (<=) 4.2.4
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiportal
Versions from including (>=) 5.1.0 and up to, including, (<=) 5.1.2
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions
Fortinet » Fortiportal
Versions from including (>=) 5.3.0 and before (<) 5.3.7
cpe:2.3:a:fortinet:fortiportal:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-36172

EPSS FAQ

0.10%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 42 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-36172

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.4	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:P	10.0	4.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: Partial
8.1	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H	2.8	5.2	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: High
4.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	2.8	1.4	Fortinet, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: None Availability: None

CWE ids for CVE-2021-36172

CWE-611 Improper Restriction of XML External Entity Reference

The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-36172

https://fortiguard.com/advisory/FG-IR-21-104

PSIRT Advisories | FortiGuard
Vendor Advisory

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Vulnerability Details : CVE-2021-36172

Products affected by CVE-2021-36172

Exploit prediction scoring system (EPSS) score for CVE-2021-36172

CVSS scores for CVE-2021-36172

CWE ids for CVE-2021-36172

References for CVE-2021-36172