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Vulnerability CVE-2020-24613
Published: 2020-08-24 Modified: 2020-08-25
| Description: |
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. |
Type:
CWE-295 (Certificate Issues)
CVSS2 => (AV:N/AC:M/Au:S/C:P/I:P/A:N)
| CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
4.9/10 |
4.9/10 |
6.8/10 |
| Exploit range |
Attack complexity |
Authentication |
Remote |
Medium |
Single time |
| Confidentiality impact |
Integrity impact |
Availability impact |
Partial |
Partial |
None |
References: |
https://research.nccgroup.com/2020/08/24/technical-advisory-wolfssl-tls-1-3-client-man-in-the-middle-attack/
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