CVE-2023-40217

描述

An issue was discovered in Python before 3.8.18, 3.9.x before 3.9.18, 3.10.x before 3.10.13, and 3.11.x before 3.11.5. It primarily affects servers (such as HTTP servers) that use TLS client authentication. If a TLS server-side socket is created, receives data into the socket buffer, and then is closed quickly, there is a brief window where the SSLSocket instance will detect the socket as "not connected" and won't initiate a handshake, but buffered data will still be readable from the socket buffer. This data will not be authenticated if the server-side TLS peer is expecting client certificate authentication, and is indistinguishable from valid TLS stream data. Data is limited in size to the amount that will fit in the buffer. (The TLS connection cannot directly be used for data exfiltration because the vulnerable code path requires that the connection be closed on initialization of the SSLSocket.)

如何修補 CVE-2023-40217

要修補 CVE-2023-40217,請將受影響套件升級到下列已修補版本。

—升級至 3.9.18-r0 或更新版本
—升級至 3.8.18 或更新版本
—升級至 3.8.18 或更新版本
—升級至 3.8.18 或更新版本
—升級至 7.3.5+dfsg-2+deb11u3 或更新版本
—升級至 2.7.18-8+deb11u1 或更新版本
—升級至 3.11.2-6+deb12u2 或更新版本
—升級至 3.9.2-1+deb11u2 或更新版本

CVE-2023-40217 正在被利用嗎?

低 — EPSS 為 0.8%,目前沒有觀察到大規模利用活動。

受影響套件(8)

from 0, < 3.9.18-r0
from 0, < 3.8.18, >= 3.9.0, < 3.9.18, >= 3.10.0, < 3.10.13, >= 3.11.0, < 3.11.5
from 0, < 3.8.18, >= 3.9.0, < 3.9.18, >= 3.10.0, < 3.10.13, >= 3.11.0, < 3.11.5
from 0, < 3.8.18, >= 3.9.0, < 3.9.18, >= 3.10.0, < 3.10.13, >= 3.11.0, < 3.11.5
from 0, < 7.3.5+dfsg-2+deb11u3
from 0, < 2.7.18-8+deb11u1
from 0, < 3.11.2-6+deb12u2
from 0, < 3.9.2-1+deb11u2

CVSS 分數

來源	版本	嚴重程度	向量
osv	CVSS 3.1	MEDIUM5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N