Vulnerability in Wolfssl
CVE-2020-24613
wolfSSL before 4.5.0 mishandles TLS 1.3 server data in the WAIT_CERT_CR state, within SanityCheckTls13MsgReceived() in tls13.c. This is an incorrect implementation of the TLS 1.3 client state machine. This allows attackers in a privileged network position to completely impersonate any TLS 1.3 servers, and read or modify potentially sensitive information between clients using the wolfSSL library and these TLS servers.
Vulnerability class: Improper Certificate Validation
EPSS: 0.009 (54.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Wolfssl
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-24613?
- CVE-2020-24613 is a medium-severity vulnerability in Wolfssl, classified under Improper Certificate Validation. CVSS score: 6.8/10. Published 2020-08-24.
- How severe is CVE-2020-24613?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2020-24613 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.