CVE-2020-24613

Public Exploit

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.

Category

6.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.26%
Third-Party Advisory nccgroup.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://research.nccgroup.com/2020/08/24/technical-advisory-wolfssl-tls-1-3-client-man-in-the-middle-attack/ third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2020-24613?
CVE-2020-24613 has been scored as a medium severity vulnerability.
How to fix CVE-2020-24613?
To fix CVE-2020-24613, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-24613 being actively exploited in the wild?
It is possible that CVE-2020-24613 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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