CVE-2021-32785

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. When mod_auth_openidc versions prior to 2.4.9 are configured to use an unencrypted Redis cache (`OIDCCacheEncrypt off`, `OIDCSessionType server-cache`, `OIDCCacheType redis`), `mod_auth_openidc` wrongly performed argument interpolation before passing Redis requests to `hiredis`, which would perform it again and lead to an uncontrolled format string bug. Initial assessment shows that this bug does not appear to allow gaining arbitrary code execution, but can reliably provoke a denial of service by repeatedly crashing the Apache workers. This bug has been corrected in version 2.4.9 by performing argument interpolation only once, using the `hiredis` API. As a workaround, this vulnerability can be mitigated by setting `OIDCCacheEncrypt` to `on`, as cache keys are cryptographically hashed before use when this option is enabled.
Configurations

Configuration 1 (hide)

AND
cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

History

30 Jan 2024, 20:47

Type Values Removed Values Added
First Time Netapp cloud Backup
Debian
Debian debian Linux
Netapp
CPE cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
References () https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html - () https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html - Mailing List, Third Party Advisory

25 May 2023, 20:18

Type Values Removed Values Added
First Time Openidc mod Auth Openidc
Openidc
CPE cpe:2.3:a:zmartzone:mod_auth_openidc:*:*:*:*:*:*:*:* cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*

30 Apr 2023, 23:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html -

10 May 2022, 18:02

Type Values Removed Values Added
References (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html - (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html - Patch, Third Party Advisory

20 Apr 2022, 00:15

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html -

18 Oct 2021, 12:55

Type Values Removed Values Added
References (CONFIRM) https://security.netapp.com/advisory/ntap-20210902-0001/ - (CONFIRM) https://security.netapp.com/advisory/ntap-20210902-0001/ - Third Party Advisory

02 Sep 2021, 09:15

Type Values Removed Values Added
References
  • (CONFIRM) https://security.netapp.com/advisory/ntap-20210902-0001/ -

04 Aug 2021, 17:20

Type Values Removed Values Added
CWE CWE-134
CPE cpe:2.3:a:zmartzone:mod_auth_openidc:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown
v2 : 4.3
v3 : 7.5
References (MISC) https://github.com/zmartzone/mod_auth_openidc/commit/dc672688dc1f2db7df8ad4abebc367116017a449 - (MISC) https://github.com/zmartzone/mod_auth_openidc/commit/dc672688dc1f2db7df8ad4abebc367116017a449 - Patch, Third Party Advisory
References (MISC) https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9 - (MISC) https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9 - Release Notes, Third Party Advisory
References (CONFIRM) https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-55r8-6w97-xxr4 - (CONFIRM) https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-55r8-6w97-xxr4 - Mitigation, Third Party Advisory

22 Jul 2021, 22:15

Type Values Removed Values Added
New CVE

Information

Published : 2021-07-22 22:15

Updated : 2024-01-30 20:47


NVD link : CVE-2021-32785

Mitre link : CVE-2021-32785

CVE.ORG link : CVE-2021-32785


JSON object : View

Products Affected

debian

  • debian_linux

apache

  • http_server

openidc

  • mod_auth_openidc

netapp

  • cloud_backup
CWE
CWE-134

Use of Externally-Controlled Format String