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7.5 High

CVE-2025-3891 Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled

Description

A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
Low
Privileges required
None
Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 8 8100020250426100353.489197 earliest → < 8100020250426100353.489197e6 8100020250426100353.489197e6
Red Hat Enterprise Linux 8.2 Advanced Update Support 8020020250612174445.4 earliest → < 8020020250612174445.4cda2c84 8020020250612174445.4cda2c84
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020250618101351.522 earliest → < 8040020250618101351.522a0ee4 8040020250618101351.522a0ee4
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020250617090503 earliest → < 8060020250617090503.ad008a3a 8060020250617090503.ad008a3a
Red Hat Enterprise Linux 8.6 Telecommunications Update Service 8060020250617090503 earliest → < 8060020250617090503.ad008a3a 8060020250617090503.ad008a3a
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 8060020250617090503 earliest → < 8060020250617090503.ad008a3a 8060020250617090503.ad008a3a
Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020250617090716.63 earliest → < 8080020250617090716.63b34585 8080020250617090716.63b34585
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020250617090716.63 earliest → < 8080020250617090716.63b34585 8080020250617090716.63b34585
Red Hat Enterprise Linux 9 Versions not published
Show the 6 other branches
Product Affected versions Fixed in
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.4 Extended Update Support Versions not published
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat In-Vehicle Operating System 1 Versions not published

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