csv-sniffer: reading on uninitialized memory may cause undefined behavior (#666)

* Report 0092-csv-sniffer to RustSec

* informational = "unsound"

crates/csv-sniffer/RUSTSEC-0000-0000.md

@@ -0,0 +1,19 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "csv-sniffer"
+date = "2021-01-05"
+url = "https://github.com/jblondin/csv-sniffer/issues/1"
+categories = ["memory-exposure"]
+informational = "unsound"
+
+[versions]
+patched = []
+```
+
+# `Read` on uninitialized memory may cause UB (fn preamble_skipcount())
+
+Affected versions of this crate passes an uninitialized buffer to a user-provided `Read` implementation (within `fn preamble_skipcount()`).
+
+Arbitrary `Read` implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer.
+Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.