CVE-2020-1967Openssl · Openssl
Vulnerability data via NVD (ingested)
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).
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
vuln:CVE-2020-1967product:"Openssl Openssl"http.html:"Openssl"More intel sources (5)
vuln:CVE-2020-1967vulnerabilities.cve_id: CVE-2020-1967CVE-2020-1967CVE-2020-1967"CVE-2020-1967" exploit -site:nvd.nist.gov