Vulnetix
Try Vulnetix Request Demo
CVE-2020-1967 PUBLISHED

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).

EPSS 67.31% · 98.5th percentile

Risk Scores

EPSS Score
67.31%
98.5th percentile

Affected Products

VendorProductVersions
Ubuntu:20.04:LTSopenssl0, 1.1.1c-1ubuntu4, 1.1.1d-2ubuntu3

Timeline

References

Open in Interactive Console →