Merge pull request #728 from JOE1994/0118-postscript

postscript: `Read` on uninitialized buffer may cause UB (`impl Walue for Vec<u8>`)

crates/postscript/RUSTSEC-0000-0000.md

@@ -0,0 +1,20 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "postscript"
+date = "2021-01-30"
+url = "https://github.com/bodoni/postscript/issues/1"
+categories = ["memory-exposure"]
+
+[versions]
+patched = [">= 0.14.0"]
+```
+
+# `Read` on uninitialized buffer may cause UB (`impl Walue for Vec<u8>`)
+
+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.
+
+This flaw was fixed in commit 8026286 by zero-initializing the buffer before handing to a user-provided `Read`.