CVE-2021-32792

XSS vulnerability when using OIDCPreservePost On in mod_auth_openidc

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In mod_auth_openidc before version 2.4.9, there is an XSS vulnerability in when using `OIDCPreservePost On`.

mod_auth_openidc es un módulo de autenticación/autorización para el servidor HTTP Apache versión 2.x que funciona como OpenID Connect Relying Party, autenticando a usuarios contra un proveedor de OpenID Connect. En mod_auth_openidc versiones anteriores a 2.4.9, se presenta una vulnerabilidad de tipo XSS cuando se usa el parámetro "OIDCPreservePost On"

A flaw was found in mod_auth_openidc. When mod_auth_openidc is configured with `OIDCPreservePost On` it is possible to trigger a cross site scripting(XSS) vulnerability that could be used by a remote attacker to execute code on the browser of the victim user. The highest threat from this flaw is to data confidentiality and integrity.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-12 CVE Reserved
2021-07-26 CVE Published
2024-04-10 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (10)

URL	Tag	Source
https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9	Release Notes
https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://github.com/zmartzone/mod_auth_openidc/commit/00c315cb0c8ab77c67be4a2ac08a71a83ac58751	2023-11-07
https://github.com/zmartzone/mod_auth_openidc/commit/55ea0a085290cd2c8cdfdd960a230cbc38ba8b56	2023-11-07
https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-458c-7pwg-3j7j	2023-11-07
https://www.oracle.com/security-alerts/cpuapr2022.html	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZVF6BSJLRQZ7PFFR4X5JSU6KUJYNOCU	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QXAWKPT5LXZSUTFSJ6IWSZC7RMYYQXQD	2023-11-07
https://access.redhat.com/security/cve/CVE-2021-32792	2022-05-10
https://bugzilla.redhat.com/show_bug.cgi?id=1986397	2022-05-10

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openidc Search vendor "Openidc"	Mod Auth Openidc Search vendor "Openidc" for product "Mod Auth Openidc"	< 2.4.9 Search vendor "Openidc" for product "Mod Auth Openidc" and version " < 2.4.9"	-	Affected	in	Apache Search vendor "Apache"	Http Server Search vendor "Apache" for product "Http Server"	>= 2.0.0 <= 2.4.48 Search vendor "Apache" for product "Http Server" and version " >= 2.0.0 <= 2.4.48"	-	Safe
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected