QID 356568

Date Published: 2023-11-09

QID 356568: Amazon Linux Security Advisory for python38 : ALAS2PYTHON3.8-2023-010

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.) (
( CVE-2023-40217)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as Medium - 5.3 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2PYTHON3.8-2023-010 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 356568

    CVE-2023-40217 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2PYTHON3.8-2023-010 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALASPYTHON3.8-2023-010.html
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