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Security Advisories

CVE-2024-5642

NVD

https://nvd.nist.gov/vuln/detail/CVE-2024-5642

Severity

6.5

Medium

CVSS V3

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Description

CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).

References

Affected packages

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