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CVE-2023-40217 Affecting python2.7 package, versions <2.7.16-2+deb10u3

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.05% (17th percentile)
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NVD
5.3 medium
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SUSE
7.4 high
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Red Hat
8.6 high

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  • Snyk ID SNYK-DEBIAN10-PYTHON27-5861800
  • published 26 Aug 2023
  • disclosed 25 Aug 2023
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Introduced: 25 Aug 2023

CVE-2023-40217 Open this link in a new tab

How to fix?

Upgrade Debian:10 python2.7 to version 2.7.16-2+deb10u3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python2.7 package and not the python2.7 package as distributed by Debian. See How to fix? for Debian:10 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.)