CVE-2020-1967

HIGH7.5EPSS 60.8%

Crash causing Denial of Service attack

Published: 8/25/2021Modified: 7/15/2024
Also known as:GHSA-jq65-29v4-4x35DSA-4661-1ALPINE-CVE-2020-1967CGA-fj68-687p-4cq7DEBIAN-CVE-2020-1967RUSTSEC-2020-0015

Description

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.

Affected packages (6)

CVSS scores

SourceVersionSeverityVector
osvCVSS 3.1HIGH7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (37)