Improper Input Validation Affecting wolfssl/wolfssl package, versions [,4.5.0)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.1% (43rd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Improper Input Validation vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-UNMANAGED-WOLFSSLWOLFSSL-2369407
  • published26 Jan 2022
  • disclosed21 Aug 2020
  • creditUnknown

Introduced: 21 Aug 2020

CVE-2020-12457  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade wolfssl/wolfssl to version 4.5.0 or higher.

Overview

Affected versions of this package are vulnerable to Improper Input Validation. 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.

CVSS Scores

version 3.1