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All vulnerabilities

Servers and applications

CVE-2020-1967

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…

Severity
High 7.5
Published
21 Apr 2020
Last changed
8 Oct 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • From 1.1.1d up to 1.1.1f
MySQLServers and applications · cpe:a:oracle:mysql
  • Every version up to 5.6.48
  • From 5.7.0 up to 5.7.30
  • From 8.0.0 up to 8.0.20

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-1967
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-1967