CVE-2021-39191
Apache mod_auth_openidc Open Redirect Vulnerability
Description
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 versions prior to 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the `target_link_uri` parameter. A patch in version 2.4.9.4 made it so that the `OIDCRedirectURLsAllowed` setting must be applied to the `target_link_uri` parameter. There are no known workarounds aside from upgrading to a patched version.
INFO
Published Date :
Sept. 3, 2021, 2:15 p.m.
Last Modified :
Nov. 7, 2023, 3:37 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
2.7
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2021-39191
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-39191.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39191 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39191 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/ [No types assigned] Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/ Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/ -
Modified Analysis by [email protected]
Jul. 24, 2023
Action Type Old Value New Value Changed Reference Type https://github.com/zmartzone/mod_auth_openidc/issues/672 Exploit, Third Party Advisory https://github.com/zmartzone/mod_auth_openidc/issues/672 Exploit Changed Reference Type https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4 Release Notes, Third Party Advisory https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4 Release Notes Changed Reference Type https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2 Third Party Advisory https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2 Vendor Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2023/07/msg00020.html No Types Assigned https://lists.debian.org/debian-lts-announce/2023/07/msg00020.html Mailing List Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/ Mailing List, Third Party Advisory https://lists.fedoraproject.org/archives/list/[email protected]/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/ Mailing List Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/ Mailing List, Third Party Advisory https://lists.fedoraproject.org/archives/list/[email protected]/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/ Mailing List Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jul. 19, 2023
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2023/07/msg00020.html [No Types Assigned] -
CPE Deprecation Remap by [email protected]
May. 25, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:zmartzone:mod_auth_openidc:*:*:*:*:*:*:*:* versions from (excluding) 2.4.9.4 OR *cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:* versions from (excluding) 2.4.9.4 -
Modified Analysis by [email protected]
Sep. 10, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/ Mailing List, Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 07, 2022
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/ [No Types Assigned] -
Modified Analysis by [email protected]
Apr. 06, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 12, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/ [No Types Assigned] -
Initial Analysis by [email protected]
Sep. 08, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Changed Reference Type https://github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d No Types Assigned https://github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d Patch, Third Party Advisory Changed Reference Type https://github.com/zmartzone/mod_auth_openidc/issues/672 No Types Assigned https://github.com/zmartzone/mod_auth_openidc/issues/672 Exploit, Third Party Advisory Changed Reference Type https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4 No Types Assigned https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4 Release Notes, Third Party Advisory Changed Reference Type https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2 No Types Assigned https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2 Third Party Advisory Added CWE NIST CWE-601 Added CPE Configuration OR *cpe:2.3:a:zmartzone:mod_auth_openidc:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.9.4
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39191 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-39191
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.33 }} 0.10%
score
0.71348
percentile