CVE-2020-12457: High severity wolfssl wolfmqtt vulnerability
Published Aug 21, 2020
·Updated
An issue was discovered in wolfSSL before 4.5.0. It mishandles the changecipherspec (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 Software
1 affected component
wolfSSL wolfssl<4.5.0
Remediation
Patch Available
Event History
Aug 21, 2020
CVE Published
via MITRE·01:06 PM
Data Sourced
via MITRE·01:06 PM
Description
Frequently Asked Questions
1
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2020-12457.
2
What is the severity of CVE-2020-12457?
The severity of CVE-2020-12457 is high with a score of 7.5 (out of 10).
3
What is the affected software?
The affected software is Wolfssl version up to exclusive 4.5.0.
4
How does CVE-2020-12457 impact the server?
CVE-2020-12457 can cause the server to become stuck in a ProcessReply() loop, resulting in a denial of service.
5
How can I fix CVE-2020-12457?
To fix CVE-2020-12457, update to Wolfssl version 4.5.0 or later.