CVE-2020-1967
7.5 · HIGHOverview
CVE-2020-1967 is a high-severity vulnerability affecting openssl openssl. It was published on April 21, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the "signature_algorithms_cert" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).
Remediation
Check the references section for vendor advisories and patches from openssl. Update openssl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| openssl | openssl | 1.1.1d | Affected |
| oracle | mysql | 0 | Affected |
| oracle | mysql_connectors | 0 | Affected |
| oracle | mysql_enterprise_monitor | 0 | Affected |
| oracle | mysql_workbench | 0 | Affected |
| netapp | active_iq_unified_manager | 7.3 | Affected |
References
Frequently Asked Questions
What is CVE-2020-1967?
CVE-2020-1967 is a high-severity vulnerability affecting openssl openssl. It was published on April 21, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2020-1967?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-1967?
Check the references section for vendor advisories and patches from openssl. Update openssl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-1967?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-1967 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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