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Home CVE Database CVE-2021-3450

CVE-2021-3450

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).

Priority: MEDIUM
CVSS v3: 7.4
Component: openssl
Publish Date: Mar 25, 2021
Related ID: --
CVSS v2: HIGH
Modified Date: Mar 28, 2021

Find out more about CVE-2021-3450 from the MITRE-CVE dictionary and NIST NVD


Products Affected

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Product Name Status Defect Fixed Downloads
Linux
Wind River Linux LTS 17 Not Vulnerable -- -- Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
Wind River Linux 8 Requires LTSS -- -- Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
Wind River Linux 9 Requires LTSS -- -- Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
Wind River Linux 7 Requires LTSS -- -- Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
Wind River Linux LTS 21 Not Vulnerable -- -- --
Wind River Linux LTS 22 Not Vulnerable -- -- --
Wind River Linux LTS 18 Fixed LIN1018-7444
10.18.44.22 Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
Wind River Linux LTS 19 Fixed LIN1019-6276
10.19.45.17 Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
Wind River Linux CD release Not Vulnerable -- -- Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
Wind River Linux 6 Requires LTSS -- -- --
Wind River Linux LTS 23 Not Vulnerable -- -- --
VxWorks
VxWorks 7 Fixed -- 21.07 Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
VxWorks 6.9 Not Vulnerable -- -- Wind River VxWorks 20210412 Security Alert for CVE-2021-3450
Helix Virtualization Platform Cert Edition
Helix Virtualization Platform Cert Edition Not Vulnerable -- -- --

Related Products

Product Name Status Defect Fixed Downloads

Notes
Requires LTSS - customers must have active LTSS (Long Term Security Shield) Support to receive up-to-date information about vulnerabilities that may affect legacy software. Please contact your Wind River account team or see https://docs.windriver.com/bundle/Support_and_Maintenance_Supplemental_Terms_and_Conditions and https://support2.windriver.com/index.php?page=plc for more information.
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