Add std CVE (#869)

rust/std/CVE-2015-20001.md

@@ -0,0 +1,16 @@
+```toml
+[advisory]
+id = "CVE-2015-20001"
+package = "std"
+categories = ["memory-corruption"]
+date = "2015-05-27"
+url = "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-20001"
+
+[versions]
+patched = [">= 1.2.0"]
+unaffected = ["< 1.0.0"]
+```
+
+# Panic safety violation in BinaryHeap
+
+In the standard library in Rust before 1.2.0, BinaryHeap is not panic-safe. The binary heap is left in an inconsistent state when the comparison of generic elements inside sift_up or sift_down_range panics. This bug leads to a drop of zeroed memory as an arbitrary type, which can result in a memory safety violation.