CVE-2021-20718
published 2021-05-20CVE-2021-20718: mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.
PriorityP338high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
3.40%
87.5th percentile
mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | libapache2-mod-auth-openidc | < libapache2-mod-auth-openidc 2.4.4.1-2 (bookworm) | libapache2-mod-auth-openidc 2.4.4.1-2 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| msrc | cbl2_mod_auth_openidc_2.4.14.2-1_on_cbl_mariner_2.0 | — | — |
| openidc | mod_auth_openidc | 2.4.0 – 2.4.7 | — |
| oracle | essbase | < 21.3 | 21.3 |
| zmartzone | mod_auth_openidc | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_oracle7.5HIGH
vendor_redhat7.5HIGH
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Oracle
Oracle Oracle Essbase Risk Matrix: Infrastructure (mod_auth_openidc) — CVE-2021-20718
vendor_oracle·2022-01-15·CVSS 7.5
CVE-2021-20718 [HIGH] Oracle Oracle Essbase Risk Matrix: Infrastructure (mod_auth_openidc) — CVE-2021-20718
Oracle Oracle Essbase Risk Matrix: Infrastructure (mod_auth_openidc) vulnerability
CVE: CVE-2021-20718
CVSS: 7.5
Protocol: Multiple
Remote exploit: Yes
Affected versions: Network
Advisory: cpujan2022 (JAN 2022)
Red Hat
mod_auth_openidc: DoS in oidc_util_read_post_params() in util.c
vendor_redhat·2021-05-14·CVSS 7.5
CVE-2021-20718 [HIGH] CWE-400 mod_auth_openidc: DoS in oidc_util_read_post_params() in util.c
mod_auth_openidc: DoS in oidc_util_read_post_params() in util.c
mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.
Package: mod_auth_openidc (Red Hat Enterprise Linux 7) - Not affected
Package: mod_auth_openidc (Red Hat Enterprise Linux 8) - Not affected
Package: mod_auth_openidc (Red Hat Enterprise Linux 9) - Not affected
Microsoft
mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.
vendor_msrc·2021-05-11·CVSS 7.5
CVE-2021-20718 [HIGH] CWE-400 mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.
mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
jpcert: jpcert
Customer Action R
Debian
CVE-2021-20718: libapache2-mod-auth-openidc - mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-se...
vendor_debian·2021·CVSS 7.5
CVE-2021-20718 [HIGH] CVE-2021-20718: libapache2-mod-auth-openidc - mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-se...
mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.
Scope: local
bookworm: resolved (fixed in 2.4.4.1-2)
bullseye: resolved (fixed in 2.4.4.1-2)
forky: resolved (fixed in 2.4.4.1-2)
sid: resolved (fixed in 2.4.4.1-2)
trixie: resolved (fixed in 2.4.4.1-2)
OSV
CVE-2021-20718: mod_auth_openidc 2
osv·2021-05-20·CVSS 7.5
CVE-2021-20718 [HIGH] CVE-2021-20718: mod_auth_openidc 2
mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/zmartzone/mod_auth_openidchttps://jvn.jp/en/jp/JVN49704918/index.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HJK366TLFEOIYWTHQSZO24MSDPBXHJU/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FV4KYMQWPS3I2QPW2C253MLIAFGBZPLK/https://www.oracle.com/security-alerts/cpujan2022.htmlhttps://www.zmartzone.eu/https://github.com/zmartzone/mod_auth_openidchttps://jvn.jp/en/jp/JVN49704918/index.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HJK366TLFEOIYWTHQSZO24MSDPBXHJU/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FV4KYMQWPS3I2QPW2C253MLIAFGBZPLK/https://www.oracle.com/security-alerts/cpujan2022.htmlhttps://www.zmartzone.eu/
2021-05-20
Published