CVEvulnerability

CVE-2020-1967

7.5 HIGH Published 2020-04-21 Modified 2026-10-08 Official page ↗
Status
Modified
Published
2020-04-21
Last modified
2026-10-08
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
CWE-476

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. 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).

Affected configurations

• openssl openssl (>= 1.1.1d <= 1.1.1f) • debian debian linux 9.0 • debian debian linux 10.0 • freebsd freebsd 12.1 • fedoraproject fedora 30 • fedoraproject fedora 31 • fedoraproject fedora 32 • oracle application server 12.1.3 • oracle enterprise manager base platform 13.4.0.0 • oracle enterprise manager for storage management 13.3.0.0 • oracle enterprise manager for storage management 13.4.0.0 • oracle enterprise manager ops center 12.4.0 • oracle http server 12.2.1.4.0 • oracle jd edwards world security a9.4 • oracle mysql (<= 5.6.48) • oracle mysql (>= 5.7.0 <= 5.7.30) • oracle mysql (>= 8.0.0 <= 8.0.20) • oracle mysql connectors (<= 8.0.20) • oracle mysql enterprise monitor (<= 4.0.12) • oracle mysql enterprise monitor (>= 8.0.0 <= 8.0.20) • oracle mysql workbench (<= 8.0.21) • oracle peoplesoft enterprise peopletools 8.56 • oracle peoplesoft enterprise peopletools 8.57 • oracle peoplesoft enterprise peopletools 8.58 • oracle peoplesoft enterprise peopletools 8.59 • netapp active iq unified manager (>= 7.3) • netapp active iq unified manager (>= 9.5) • netapp e-series performance analyzer • netapp oncommand insight • netapp oncommand workflow automation • netapp smi-s provider • netapp snapcenter • netapp steelstore cloud integrated storage • broadcom fabric operating system • opensuse leap 15.1 • opensuse leap 15.2 • jdedwards enterpriseone (< 9.2.5.0) • tenable log correlation engine (< 6.0.9)

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References