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cryptography@42.0.4 vulnerabilities

cryptography is a package which provides cryptographic recipes and primitives to Python developers.

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Direct Vulnerabilities

Known vulnerabilities in the cryptography package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • L
Uncontrolled Resource Consumption ('Resource Exhaustion')

Affected versions of this package are vulnerable to Uncontrolled Resource Consumption ('Resource Exhaustion') due to the session cache entering an incorrect state and failing to flush properly as it fills, leading to uncontrolled memory consumption. This condition is triggered under certain server configurations when processing TLSv1.3 sessions. Specifically, this occurs if the non-default SSL_OP_NO_TICKET option is enabled, but not if early_data support is configured along with the default anti-replay protection. A malicious client could deliberately create this scenario to force a service disruption. It may also occur accidentally in normal operation.

Note:

This issue is only exploitable if the server supports TLSv1.3 and is configured with the SSL_OP_NO_TICKET option enabled.

How to fix Uncontrolled Resource Consumption ('Resource Exhaustion')?

Upgrade cryptography to version 42.0.6 or higher.

[35.0.0,42.0.6)
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