| Package | Affected versions | Patched versions |
|---|---|---|
| swiftnio ssl | ≥ 2.18.0, < 2.37.2 | 2.37.2 |
NIOSSLCertificate._subjectAlternativeNames provides access to the raw bytes for a cert's SANs. NIOSSL provides access to a buffer assumed to be backed by an ASN1_STRING, but not all SANs are backed by ASN1_STRING, so accessing the buffer for such a type can lead to out-of-bounds memory access. This vulnerability is addressed in swift-nio-ssl version 2.37.2.
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