Vulnerabilities > CVE-2020-12457 - Infinite Loop vulnerability in Wolfssl

Summary

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.

Vulnerable Configurations

Common Weakness Enumeration (CWE)

• CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

References