gfx-auxil: Read on uninitialized buffer may cause UB ( `gfx_auxil::…

…read_spirv()` ) (#681)

* Report 0101-gfx-auxil to RustSec

* add 'informational = unsound'

crates/gfx-auxil/RUSTSEC-0000-0000.md

@@ -0,0 +1,19 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "gfx-auxil"
+date = "2021-01-07"
+url = "https://github.com/gfx-rs/gfx/issues/3567"
+categories = ["memory-exposure"]
+informational = "unsound"
+
+[versions]
+patched = []
+```
+
+# Reading on uninitialized buffer may cause UB ( `gfx_auxil::read_spirv()` )
+
+Affected versions of this crate passes an uninitialized buffer to a user-provided `Read` implementation.
+
+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.