Safety vulnerability ID: 60680
The information on this page was manually curated by our Cybersecurity Intelligence Team.
Python 3.8.18, 3.9.18, 3.10.13, 3.11.5 and 3.12.0rc2 include a fix for CVE-2023-40217: 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.
https://github.com/python/cpython/issues/108310
https://mail.python.org/archives/list/[email protected]/thread/PEPLII27KYHLF4AK3ZQGKYNCRERG4YXY
Latest version: 0.9.8
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.) See CVE-2023-40217.
CONFIRM:https://mail.python.org/archives/list/[email protected]/thread/PEPLII27KYHLF4AK3ZQGKYNCRERG4YXY/: https://mail.python.org/archives/list/[email protected]/thread/PEPLII27KYHLF4AK3ZQGKYNCRERG4YXY/
MISC:https://www.python.org/dev/security/: https://www.python.org/dev/security/
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