Uncontrolled Resource Consumption ('Resource Exhaustion') Affecting pyopenssl package, versions [22.0.0,]


Severity

Recommended
0.0
low
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-PYTHON-PYOPENSSL-6592766
  • published9 Apr 2024
  • disclosed8 Apr 2024
  • creditManish Patidar

Introduced: 8 Apr 2024

CVE-2024-2511  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

There is no fixed version for pyOpenSSL.

Overview

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.

CVSS Scores

version 3.1