CVEvulnerability

CVE-2020-12457

7.5 HIGH Published 2020-08-21 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-08-21
Last modified
2026-06-17
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-835

Description

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.

Affected configurations

• wolfssl wolfssl (< 4.5.0)

Related

Weakness · CWE (1)

  • CWE-835 Loop with Unreachable Exit Condition weakness

References