Add advisory for openssl CVE-2022-1473 (#1245)

crates/openssl-src/RUSTSEC-0000-0000.md

@@ -0,0 +1,29 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "openssl-src"
+aliases = ["CVE-2022-1473"]
+cvss = "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
+categories = ["crypto-failure"]
+date = "2022-05-03"
+url = "https://www.openssl.org/news/secadv/20220503.txt"
+
+[versions]
+patched = [">= 300.0.6"]
+unaffected = ["< 300.0"]
+```
+
+# Resource leakage when decoding certificates and keys
+
+The `OPENSSL_LH_flush()` function, which empties a hash table, contains
+a bug that breaks reuse of the memory occupied by the removed hash
+table entries.
+
+This function is used when decoding certificates or keys. If a long lived
+process periodically decodes certificates or keys its memory usage will
+expand without bounds and the process might be terminated by the operating
+system causing a denial of service. Also traversing the empty hash table
+entries will take increasingly more time.
+
+Typically such long lived processes might be TLS clients or TLS servers
+configured to accept client certificate authentication.