Add advisory for temporary (#1196)

Thanks @5225225

crates/temporary/RUSTSEC-0000-0000.md

@@ -0,0 +1,32 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "temporary"
+date = "2018-08-22"
+url = "https://github.com/stainless-steel/temporary/issues/2"
+categories = ["memory-exposure"]
+keywords = ["uninitialized-memory"]
+
+[versions]
+patched = [">= 0.6.4"]
+unaffected = ["< 0.3.0"]
+```
+
+# Use of uninitialized memory in temporary
+
+Uninit memory is used as a RNG seed in temporary
+
+The following function is used as a way to get entropy from the system, which does operations on and exposes uninit memory, which is UB.
+
+```rust
+fn random_seed(_: &Path, _: &str) -> [u64; 2] {
+    use std::mem::uninitialized as rand;
+    unsafe { [rand::<u64>() ^ 0x12345678, rand::<u64>() ^ 0x87654321] }
+}
+```
+
+This has been resolved in the 0.6.4 release.
+
+The crate is not intended to be used outside of a testing environment.
+
+For a general purpose crate to create temporary directories, [`tempfile`](https://crates.io/crates/tempfile) is an alternative for this crate.