CVE - CVE-2021-3450

CVE-ID
CVE-2021-3450	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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).
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CISCO:20210325 Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: March 2021 URL:https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJd CONFIRM:https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf URL:https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf CONFIRM:https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2a40b7bc7b94dd7de897a74571e7024f0cf0d63b URL:https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2a40b7bc7b94dd7de897a74571e7024f0cf0d63b CONFIRM:https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845 URL:https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845 CONFIRM:https://kc.mcafee.com/corporate/index?page=content&id=SB10356 URL:https://kc.mcafee.com/corporate/index?page=content&id=SB10356 CONFIRM:https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013 URL:https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013 CONFIRM:https://security.netapp.com/advisory/ntap-20210326-0006/ URL:https://security.netapp.com/advisory/ntap-20210326-0006/ CONFIRM:https://www.openssl.org/news/secadv/20210325.txt URL:https://www.openssl.org/news/secadv/20210325.txt CONFIRM:https://www.tenable.com/security/tns-2021-05 URL:https://www.tenable.com/security/tns-2021-05 CONFIRM:https://www.tenable.com/security/tns-2021-08 URL:https://www.tenable.com/security/tns-2021-08 CONFIRM:https://www.tenable.com/security/tns-2021-09 URL:https://www.tenable.com/security/tns-2021-09 FEDORA:FEDORA-2021-cbf14ab8f9 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/ GENTOO:GLSA-202103-03 URL:https://security.gentoo.org/glsa/202103-03 MISC:https://mta.openssl.org/pipermail/openssl-announce/2021-March/000198.html URL:https://mta.openssl.org/pipermail/openssl-announce/2021-March/000198.html MISC:https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc MISC:https://www.oracle.com//security-alerts/cpujul2021.html URL:https://www.oracle.com//security-alerts/cpujul2021.html MISC:https://www.oracle.com/security-alerts/cpuApr2021.html URL:https://www.oracle.com/security-alerts/cpuApr2021.html MISC:https://www.oracle.com/security-alerts/cpuapr2022.html URL:https://www.oracle.com/security-alerts/cpuapr2022.html MISC:https://www.oracle.com/security-alerts/cpujul2022.html URL:https://www.oracle.com/security-alerts/cpujul2022.html MISC:https://www.oracle.com/security-alerts/cpuoct2021.html URL:https://www.oracle.com/security-alerts/cpuoct2021.html MLIST:[oss-security] 20210327 OpenSSL 1.1.1 CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT, CVE-2021-3449 NULL pointer deref in signature_algorithms processing URL:http://www.openwall.com/lists/oss-security/2021/03/27/1 MLIST:[oss-security] 20210327 Re: OpenSSL 1.1.1 CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT, CVE-2021-3449 NULL pointer deref in signature_algorithms processing URL:http://www.openwall.com/lists/oss-security/2021/03/27/2 MLIST:[oss-security] 20210328 Re: OpenSSL 1.1.1 CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT, CVE-2021-3449 NULL pointer deref in signature_algorithms processing URL:http://www.openwall.com/lists/oss-security/2021/03/28/3 MLIST:[oss-security] 20210328 Re: OpenSSL 1.1.1 CVE-2021-3450 CA certificate check bypass with X509_V_FLAG_X509_STRICT, CVE-2021-3449 NULL pointer deref in signature_algorithms processing URL:http://www.openwall.com/lists/oss-security/2021/03/28/4
Assigning CNA
OpenSSL Software Foundation
Date Record Created
20210319	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210319)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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