CVE-2021-32785
mod_auth_openidc: format string bug in the Redis cache implementation
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 22, 2021
Updated · November 22, 2025
Description
A flaw was found in mod_auth_openidc. When mod_auth_openidc is configured to use unencrypted Redis cache it is possible to trigger a format string bug that could be used by a remote unauthenticated attacker to crash the httpd workers. The highest threat from this liability is to service availability.
Statement
This issue did not affect the versions of mod_auth_openidc as shipped with Red Hat Enterprise Linux 7, and 8 as they did not include support for Redis cache.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-134 · Use of Externally-Controlled Format String