nats-streaming-server: add patch for CVE-2022-26652

pkgs/servers/nats-streaming-server/2.2.1-CVE-2022-26652.patch

@@ -0,0 +1,41 @@
+Based on upstream's nats-server fix
+https://github.com/nats-io/nats-server/commit/b4128693ed61aa0c32179af07677bcf1d8301dcd
+with test changes removed, the path -> filepath changes omitted
+(as it is for the benefit of windows, which we don't really support)
+and re-targeted at the vendored copy.
+
+--- a/vendor/github.com/nats-io/nats-server/v2/server/stream.go
++++ b/vendor/github.com/nats-io/nats-server/v2/server/stream.go
+@@ -3620,6 +3619,17 @@
+ 	}
+ 	defer os.RemoveAll(sdir)
+ 
++	logAndReturnError := func() error {
++		a.mu.RLock()
++		err := fmt.Errorf("unexpected content (account=%s)", a.Name)
++		if a.srv != nil {
++			a.srv.Errorf("Stream restore failed due to %v", err)
++		}
++		a.mu.RUnlock()
++		return err
++	}
++	sdirCheck := filepath.Clean(sdir) + string(os.PathSeparator)
++
+ 	tr := tar.NewReader(s2.NewReader(r))
+ 	for {
+ 		hdr, err := tr.Next()
+@@ -3629,7 +3639,13 @@
+ 		if err != nil {
+ 			return nil, err
+ 		}
+-		fpath := path.Join(sdir, filepath.Clean(hdr.Name))
++		if hdr.Typeflag != tar.TypeReg && hdr.Typeflag != tar.TypeRegA {
++			return nil, logAndReturnError()
++		}
++		fpath := filepath.Join(sdir, filepath.Clean(hdr.Name))
++		if !strings.HasPrefix(fpath, sdirCheck) {
++			return nil, logAndReturnError()
++		}
+ 		os.MkdirAll(filepath.Dir(fpath), defaultDirPerms)
+ 		fd, err := os.OpenFile(fpath, os.O_CREATE|os.O_RDWR, 0600)
+ 		if err != nil {

pkgs/servers/nats-streaming-server/default.nix

@@ -14,6 +14,8 @@ buildGoPackage rec {
     sha256 = "sha256-VdYyui0fyoNf1q3M1xTg/UMlxIFABqAbqQaD0bLpKCY=";
   };
 
+  patches = [ ./2.2.1-CVE-2022-26652.patch ];
+
   meta = {
     description = "NATS Streaming System Server";
     license = licenses.asl20;