OpenSSL.SSL_check_chain.NULL.Pointer.Dereference

description-logoDescription

This indicates an attack attempt to exploit a Memory Access Error Vulnerability in OpenSSL Project OpenSSL.
This vulnerability is due to incorrect handling of the "signature_algorithms_cert" TLS extension by SSL_check_chain(). Successful exploitation will cause the service to abnormally terminate, leading to a denial-of-service condition.

affected-products-logoAffected Products

OpenSSL Project OpenSSL 1.1.1d
OpenSSL Project OpenSSL 1.1.1e
OpenSSL Project OpenSSL 1.1.1f

Impact logoImpact

Denial of Service: Remote attackers can crash vulnerable systems.

recomended-action-logoRecommended Actions

Apply the most recent upgrade or patch from the vendor.
https://www.openssl.org/news/secadv/20200421.txt

Telemetry logoTelemetry

Coverage

IPS (Regular DB)
IPS (Extended DB)

Version Updates

Date Version Detail
2020-05-14 15.845 Default_action:pass:drop
2020-05-06 15.838
2020-05-06 15.837
2020-05-06 15.836