Access Restriction Bypass Affecting python package, versions [3.8.0,3.8.18)[3.9.0, 3.9.18)[3.10.0,3.10.13)[3.11.0,3.11.5)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Aug 2023
- disclosed26 Aug 2023
- creditAapo Oksman
Introduced: 26 Aug 2023
CVE-2023-40217 (opens in a new tab)How to fix?
Upgrade python to version 3.8.18, 3.9.18, 3.10.13, 3.11.5 or higher.
Overview
Affected versions of this package are vulnerable to Access Restriction Bypass leading to bypass of the TLS handshake. 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.