CVE-2020-12457
First published: Fri Aug 21 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| WolfSSL wolfssl | <4.5.0 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2020-12457.
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).
What is the affected software?
The affected software is Wolfssl version up to exclusive 4.5.0.
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.
How can I fix CVE-2020-12457?
To fix CVE-2020-12457, update to Wolfssl version 4.5.0 or later.
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