Vulnerability Database

328,409

Total vulnerabilities in the database

CVE-2021-3450

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).

CVSS v3:

  • Severity: High
  • Score: 7.4
  • AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v2:

  • Severity: Medium
  • Score: 5.8
  • AV:N/AC:M/Au:N/C:P/I:P/A:N
Software From Fixed in
openssl / openssl 1.1.1h 1.1.1k
freebsd / freebsd 12.2-p1 12.2-p1.x
freebsd / freebsd 12.2-p2 12.2-p2.x
freebsd / freebsd 12.2 12.2.x
windriver / linux 18.0 18.0.x
windriver / linux 19.0 19.0.x
windriver / linux 17.0 17.0.x
fedoraproject / fedora 34 34.x
tenable / nessus_agent 8.2.1 8.2.3.x
tenable / nessus - 8.13.1.x
tenable / nessus_network_monitor 5.11.1 5.11.1.x
tenable / nessus_network_monitor 5.12.0 5.12.0.x
tenable / nessus_network_monitor 5.12.1 5.12.1.x
tenable / nessus_network_monitor 5.13.0 5.13.0.x
tenable / nessus_network_monitor 5.11.0 5.11.0.x
oracle / jd_edwards_world_security a9.4 a9.4.x
oracle / weblogic_server 12.2.1.4.0 12.2.1.4.0.x
oracle / weblogic_server 14.1.1.0.0 14.1.1.0.0.x
oracle / enterprise_manager_for_storage_management 13.4.0.0 13.4.0.0.x
oracle / secure_global_desktop 5.6 5.6.x
oracle / graalvm 20.3.1.2 20.3.1.2.x
oracle / graalvm 21.0.0.2 21.0.0.2.x
oracle / graalvm 19.3.5 19.3.5.x
oracle / mysql_server 8.0.15 8.0.23.x
oracle / mysql_server - 5.7.33.x
oracle / mysql_workbench - 8.0.23.x
oracle / commerce_guided_search 11.3.2 11.3.2.x
oracle / mysql_connectors - 8.0.23.x
oracle / jd_edwards_enterpriseone_tools - 9.2.6.0
oracle / mysql_enterprise_monitor - 8.0.23.x
oracle / secure_backup - 18.1.0.1.0
oracle / peoplesoft_enterprise_peopletools 8.57 8.59.x
mcafee / web_gateway_cloud_service 10.1.1 10.1.1.x
mcafee / web_gateway_cloud_service 9.2.10 9.2.10.x
mcafee / web_gateway_cloud_service 8.2.19 8.2.19.x
mcafee / web_gateway 10.1.1 10.1.1.x
mcafee / web_gateway 9.2.10 9.2.10.x
mcafee / web_gateway 8.2.19 8.2.19.x
sonicwall / sma100_firmware - 10.2.1.0-17sv
sonicwall / sonicos - 7.0.1-r1456.x
sonicwall / email_security - 10.0.11
sonicwall / capture_client - 3.6.24
Rust icon openssl-src 111.11.0 111.15.0
nodejs / node.js 15.0.0 15.14.0
nodejs / node.js 14.0.0 14.16.1
nodejs / node.js 12.0.0 12.22.1
nodejs / node.js 10.0.0 10.24.1

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.