Description
The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j).
No analysis available yet.
Remediation
No remediation available yet.
Tracking
Sign in to view the affected projects.
Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2021-1641 | The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j). |
Github GHSA |
GHSA-8hfj-xrj2-pm22 | Certificate check bypass in openssl-src |
References
History
No history.
Subscriptions
Fedoraproject
Subscribe
Fedora
Subscribe
Freebsd
Subscribe
Freebsd
Subscribe
Mcafee
Subscribe
Web Gateway
Subscribe
Web Gateway Cloud Service
Subscribe
Netapp
Subscribe
Cloud Volumes Ontap Mediator
Subscribe
Oncommand Workflow Automation
Subscribe
Ontap Select Deploy Administration Utility
Subscribe
Santricity Smi-s Provider
Subscribe
Santricity Smi-s Provider Firmware
Subscribe
Storagegrid
Subscribe
Storagegrid Firmware
Subscribe
Nodejs
Subscribe
Node.js
Subscribe
Openssl
Subscribe
Openssl
Subscribe
Oracle
Subscribe
Commerce Guided Search
Subscribe
Enterprise Manager For Storage Management
Subscribe
Graalvm
Subscribe
Jd Edwards Enterpriseone Tools
Subscribe
Jd Edwards World Security
Subscribe
Mysql Connectors
Subscribe
Mysql Enterprise Monitor
Subscribe
Mysql Server
Subscribe
Mysql Workbench
Subscribe
Peoplesoft Enterprise Peopletools
Subscribe
Secure Backup
Subscribe
Secure Global Desktop
Subscribe
Weblogic Server
Subscribe
Redhat
Subscribe
Enterprise Linux
Subscribe
Jboss Core Services
Subscribe
Jboss Enterprise Web Server
Subscribe
Rhev Hypervisor
Subscribe
Sonicwall
Subscribe
Capture Client
Subscribe
Email Security
Subscribe
Sma100
Subscribe
Sma100 Firmware
Subscribe
Sonicos
Subscribe
Tenable
Subscribe
Nessus
Subscribe
Nessus Agent
Subscribe
Nessus Network Monitor
Subscribe
Windriver
Subscribe
Linux
Subscribe
Status: PUBLISHED
Assigner: openssl
Published:
Updated: 2024-09-17T03:07:10.879Z
Reserved: 2021-03-19T00:00:00.000Z
Link: CVE-2021-3450
No data.
Status : Modified
Published: 2021-03-25T15:15:13.560
Modified: 2024-11-21T06:21:33.633
Link: CVE-2021-3450
OpenCVE Enrichment
No data.
Weaknesses
EUVD
Github GHSA