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GCC 10 gets security bug trap. And look what just fell into it: OpenSSL and a prod-of-death flaw in servers and apps [theregister.co.uk]
Static analyzer proves its worth with discovery of null-pointer error

A static analysis feature set to appear in GCC 10, which will catch common programming errors that can lead to security vulnerabilities, has scored an early win – it snared an exploitable flaw in OpenSSL.

Bernd Edlinger discovered CVE-2020-1967 [openssl.org], a denial-of-service flaw deemed to be a high severity risk by the OpenSSL team. It is possible to crash a server or application that uses a vulnerable build of OpenSSL by sending specially crafted messages while setting up a TLS 1.3 connection.

This means it's possible to disrupt or knock offline HTTPS websites that use a vulnerable version of the crypto library, by sending a prod-of-death. It can also be used by rogue servers to crash web browsers and other apps connecting in.

OpenSSL is a software library widely used to provide encrypted connections across networks and the internet.

Here's the technical description from the OpenSSL maintainers of the flaw:

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.

Original Submission