CVE-2022-39173

Description

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.

How to fix CVE-2022-39173

To remediate CVE-2022-39173, upgrade the affected package to a fixed version below.

• —upgrade to 4.6.0+p1-0+deb11u2 or later

Is CVE-2022-39173 being exploited?

Low — EPSS is 1.4%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 4.6.0+p1-0+deb11u2

CVSS scores

References (1)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-39173