CVE-2022-39173

In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3 handshake. This occurs when an attacker supposedly resumes a previous TLS session. During the resumption Client Hello a Hello Retry Request must be triggered. Both Client Hellos are required to contain a list of duplicate cipher suites to trigger the buffer overflow. In total, two Client Hellos have to be sent: one in the resumed session, and a second one as a response to a Hello Retry Request message.

Affected products

Alt Linux, Wolfssl

Wolfssl

< 5.5.1

Fix

Available

CVSS 3.1

7.5 HIGH

EPSS

4.5% (91th percentile)

Weakness

CWE-787

NVD status

Modified

Published

2022-09-29