Published:2021/05/14 Last Updated:2021/05/14
JVN#49704918
mod_auth_openidc vulnerable to denial-of-service (DoS)
Overview
mod_auth_openidc contains a denial-of-service (DoS) vulnerability.
Products Affected
- mod_auth_openidc 2.4.0 to 2.4.7
Description
mod_auth_openidc provided by ZmartZone is an OpenID Connect's Relying Party module for Apache HTTP Server. This module contains a denial-of-service (DoS) vulnerability (CWE-400).
Impact
A remote attacker may cause a denial-of-service (DoS) condition.
Solution
Update the software
Update to the latest version according to the information provided by the developer.
Vendor Status
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
CVSS v3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score:
7.5
| Attack Vector(AV) | Physical (P) | Local (L) | Adjacent (A) | Network (N) |
|---|---|---|---|---|
| Attack Complexity(AC) | High (H) | Low (L) | ||
| Privileges Required(PR) | High (H) | Low (L) | None (N) | |
| User Interaction(UI) | Required (R) | None (N) | ||
| Scope(S) | Unchanged (U) | Changed (C) | ||
| Confidentiality Impact(C) | None (N) | Low (L) | High (H) | |
| Integrity Impact(I) | None (N) | Low (L) | High (H) | |
| Availability Impact(A) | None (N) | Low (L) | High (H) |
CVSS v2
AV:N/AC:L/Au:N/C:N/I:N/A:P
Base Score:
5.0
| Access Vector(AV) | Local (L) | Adjacent Network (A) | Network (N) |
|---|---|---|---|
| Access Complexity(AC) | High (H) | Medium (M) | Low (L) |
| Authentication(Au) | Multiple (M) | Single (S) | None (N) |
| Confidentiality Impact(C) | None (N) | Partial (P) | Complete (C) |
| Integrity Impact(I) | None (N) | Partial (P) | Complete (C) |
| Availability Impact(A) | None (N) | Partial (P) | Complete (C) |
Credit
Tatsuhiko Yasumatsu reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
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| JPCERT Reports |
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| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
CVE-2021-20718 |
| JVN iPedia |
JVNDB-2021-000037 |