From 181b3a8f0988ab729270279e6e12534cb52628cc Mon Sep 17 00:00:00 2001
From: Lauris BH <lauris@nix.lv>
Date: Tue, 1 May 2018 04:46:04 +0300
Subject: [PATCH] Fix path cleanup in multiple places (#3871)

---
 models/repo.go         |  2 +-
 modules/lfs/server.go  | 18 ++++++++++++++----
 routers/repo/editor.go |  4 ++--
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/models/repo.go b/models/repo.go
index a7e8bd2a523c..99ab24756611 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -1133,7 +1133,7 @@ type CreateRepoOptions struct {
 }
 
 func getRepoInitFile(tp, name string) ([]byte, error) {
-	cleanedName := strings.TrimLeft(name, "./")
+	cleanedName := strings.TrimLeft(path.Clean("/"+name), "/")
 	relPath := path.Join("options", tp, cleanedName)
 
 	// Use custom file when available.
diff --git a/modules/lfs/server.go b/modules/lfs/server.go
index a81d8e5c913c..dc12791775cf 100644
--- a/modules/lfs/server.go
+++ b/modules/lfs/server.go
@@ -83,6 +83,8 @@ type link struct {
 	ExpiresAt time.Time         `json:"expires_at,omitempty"`
 }
 
+var oidRegExp = regexp.MustCompile(`^[A-Fa-f0-9]+$`)
+
 // ObjectOidHandler is the main request routing entry point into LFS server functions
 func ObjectOidHandler(ctx *context.Context) {
 
@@ -217,6 +219,12 @@ func PostHandler(ctx *context.Context) {
 
 	if !authenticate(ctx, repository, rv.Authorization, true) {
 		requireAuth(ctx)
+		return
+	}
+
+	if !oidRegExp.MatchString(rv.Oid) {
+		writeStatus(ctx, 404)
+		return
 	}
 
 	meta, err := models.NewLFSMetaObject(&models.LFSMetaObject{Oid: rv.Oid, Size: rv.Size, RepositoryID: repository.ID})
@@ -284,10 +292,12 @@ func BatchHandler(ctx *context.Context) {
 			continue
 		}
 
-		// Object is not found
-		meta, err = models.NewLFSMetaObject(&models.LFSMetaObject{Oid: object.Oid, Size: object.Size, RepositoryID: repository.ID})
-		if err == nil {
-			responseObjects = append(responseObjects, Represent(object, meta, meta.Existing, !contentStore.Exists(meta)))
+		if oidRegExp.MatchString(object.Oid) {
+			// Object is not found
+			meta, err = models.NewLFSMetaObject(&models.LFSMetaObject{Oid: object.Oid, Size: object.Size, RepositoryID: repository.ID})
+			if err == nil {
+				responseObjects = append(responseObjects, Represent(object, meta, meta.Existing, !contentStore.Exists(meta)))
+			}
 		}
 	}
 
diff --git a/routers/repo/editor.go b/routers/repo/editor.go
index 6c6bf304fc47..d36bcc4c36e0 100644
--- a/routers/repo/editor.go
+++ b/routers/repo/editor.go
@@ -163,7 +163,7 @@ func editFilePost(ctx *context.Context, form auth.EditRepoFileForm, isNewFile bo
 		branchName = form.NewBranchName
 	}
 
-	form.TreePath = strings.Trim(form.TreePath, " /")
+	form.TreePath = strings.Trim(path.Clean("/"+form.TreePath), " /")
 	treeNames, treePaths := getParentTreeFields(form.TreePath)
 
 	ctx.Data["TreePath"] = form.TreePath
@@ -477,7 +477,7 @@ func UploadFilePost(ctx *context.Context, form auth.UploadRepoFileForm) {
 		branchName = form.NewBranchName
 	}
 
-	form.TreePath = strings.Trim(form.TreePath, " /")
+	form.TreePath = strings.Trim(path.Clean("/"+form.TreePath), " /")
 	treeNames, treePaths := getParentTreeFields(form.TreePath)
 	if len(treeNames) == 0 {
 		// We must at least have one element for user to input.