CVE-2024-0397

Description

A defect was discovered in the Python “ssl” module where there is a memory race condition with the ssl.SSLContext methods “cert_store_stats()” and “get_ca_certs()”. The race condition can be triggered if the methods are called at the same time as certificates are loaded into the SSLContext, such as during the TLS handshake with a certificate directory configured. This issue is fixed in CPython 3.10.14, 3.11.9, 3.12.3, and 3.13.0a5.

How to fix CVE-2024-0397

To remediate CVE-2024-0397, upgrade the affected package to a fixed version below.

—upgrade to 3.8.20 or later
—upgrade to 3.8.20 or later
—upgrade to 3.8.20 or later
—no fix listed
—no fix listed
—upgrade to 3.11.2-6+deb12u3 or later
—upgrade to 3.11.2-6+deb12u3 or later
—upgrade to 3.9.2-1+deb11u2 or later

Is CVE-2024-0397 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (8)

from 0, < 3.8.20, >= 3.9.0, < 3.9.20, >= 3.10.0, < 3.10.14, >= 3.11.0, < 3.11.9, >= 3.12.0, < 3.12.3
from 0, < 3.8.20, >= 3.9.0, < 3.9.20, >= 3.10.0, < 3.10.14, >= 3.11.0, < 3.11.9, >= 3.12.0, < 3.12.3
from 0, < 3.8.20, >= 3.9.0, < 3.9.20, >= 3.10.0, < 3.10.14, >= 3.11.0, < 3.11.9, >= 3.12.0, < 3.12.3
from 0
from 0
from 0, < 3.11.2-6+deb12u3
from 0, < 3.11.2-6+deb12u3
from 0, < 3.9.2-1+deb11u2

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H