CVE-2023-40217 Affecting python3 package, versions <0:3.6.8-51.el8_8.2.rocky.0


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.1% (42nd percentile)

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  • Snyk IDSNYK-ROCKY8-PYTHON3-6032535
  • published7 Oct 2023
  • disclosed25 Aug 2023

Introduced: 25 Aug 2023

CVE-2023-40217  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 python3 to version 0:3.6.8-51.el8_8.2.rocky.0 or higher.
This issue was patched in RLSA-2023:5997.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3 package and not the python3 package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

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.)

CVSS Scores

version 3.1