rustls-webpki: Denial of service via panic on malformed CRL BIT STRING

Summary bitstringflags in src/der.rs panics with an index-out-of-bounds when given a BIT STRING whose content is exactly 0x00 one byte: zero padding bits, zero data bytes. This is reachable through the public API BorrowedCertRevocationList::fromder via the issuingDistributionPoint CRL extension...

GHSA-82J2-J2CH-GFR8 rustls-webpki: Denial of service via panic on malformed CRL BIT STRING

Summary bitstringflags in src/der.rs panics with an index-out-of-bounds when given a BIT STRING whose content is exactly 0x00 one byte: zero padding bits, zero data bytes. This is reachable through the public API BorrowedCertRevocationList::fromder via the issuingDistributionPoint CRL extension...