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).
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| python2.7 | — | — |
| python3.4 | — | — |
| python3.5 | — | — |
| python3.9 | — | — |
Similar Threats
- Unknown CLSA-2024-1721401321
- Unknown CLSA-2024-1721401573
- Unknown CLSA-2023-1702573269
- Unknown CLSA-2023-1702573728
- Unknown CLSA-2023-1701971229
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