Improper Input Validation Affecting wolfssl package, versions *


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.53% (72nd percentile)

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  • Snyk IDSNYK-UBUNTU1804-WOLFSSL-608377
  • published21 Aug 2020
  • disclosed21 Aug 2020

Introduced: 21 Aug 2020

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

How to fix?

There is no fixed version for Ubuntu:18.04 wolfssl.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wolfssl package and not the wolfssl package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

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 Base Scores

version 3.1