CVE-2022-39173

In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3 handshake

High · published September 29, 2022

CVSS v3.1
7.5
EPSS
6%
Percentile
93.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.05763 · 93.1th percentile
Published
2022-09-29T00:00Z
EPSS history
Timeline
  • 29 SEP 00:00Z
    In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3 handshake
    cvelistv5