Your submission was sent successfully! Close

CVE-2020-12457

Published: 21 August 2020

An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends ChangeCipherSpec messages in a crafted way involving more than one in a row, the server becomes stuck in the ProcessReply() loop, i.e., a denial of service.

Priority

Low

CVSS 3 base score: 7.5

Status

Package Release Status
wolfssl
Launchpad, Ubuntu, Debian
Upstream
Released (v4.5.0-stable)
Ubuntu 21.10 (Impish Indri) Not vulnerable
(4.5.0+dfsg-2)
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
(4.5.0+dfsg-2)
Ubuntu 20.04 LTS (Focal Fossa) Needed

Ubuntu 18.04 LTS (Bionic Beaver) Needed

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(end of standard support, was needed)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Patches:
Upstream: https://github.com/wolfSSL/wolfssl/commit/df1b7f34f173cfc2968ce12e8fcd2fd8bcc61a59 (v4.5.0-stable)