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#57 Validate paths passed to GCDWebDAVServer and GCDWebUploader to ensure they are within the upload directory

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This commit is contained in:
Pierre-Olivier Latour 2014-06-22 15:53:02 -07:00
parent 7c6e85cf9a
commit 9d48f9ec12
2 changed files with 35 additions and 16 deletions
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23
GCDWebDAVServer/GCDWebDAVServer.m
View File

@ -61,6 +61,11 @@ typedef NS_ENUM(NSInteger, DAVProperties) {
@implementation GCDWebDAVServer (Methods)
// Must match implementation in GCDWebUploader
- (BOOL)_checkSandboxedPath:(NSString*)path {
return [[path stringByStandardizingPath] hasPrefix:_uploadDirectory];
}
- (BOOL)_checkFileExtension:(NSString*)fileName {
if (_allowedExtensions && ![_allowedExtensions containsObject:[[fileName pathExtension] lowercaseString]]) {
return NO;
@ -87,7 +92,7 @@ static inline BOOL _IsMacFinder(GCDWebServerRequest* request) {
NSString* relativePath = request.path;
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
BOOL isDirectory = NO;
if (![absolutePath hasPrefix:_uploadDirectory] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
if (![self _checkSandboxedPath:absolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
@ -116,7 +121,7 @@ static inline BOOL _IsMacFinder(GCDWebServerRequest* request) {
NSString* relativePath = request.path;
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
if (![absolutePath hasPrefix:_uploadDirectory]) {
if (![self _checkSandboxedPath:absolutePath]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
BOOL isDirectory;
@ -161,7 +166,7 @@ static inline BOOL _IsMacFinder(GCDWebServerRequest* request) {
NSString* relativePath = request.path;
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
BOOL isDirectory = NO;
if (![absolutePath hasPrefix:_uploadDirectory] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
if (![self _checkSandboxedPath:absolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
@ -194,7 +199,7 @@ static inline BOOL _IsMacFinder(GCDWebServerRequest* request) {
NSString* relativePath = request.path;
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
if (![absolutePath hasPrefix:_uploadDirectory]) {
if (![self _checkSandboxedPath:absolutePath]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
BOOL isDirectory;
@ -243,7 +248,7 @@ static inline BOOL _IsMacFinder(GCDWebServerRequest* request) {
NSString* srcRelativePath = request.path;
NSString* srcAbsolutePath = [_uploadDirectory stringByAppendingPathComponent:srcRelativePath];
if (![srcAbsolutePath hasPrefix:_uploadDirectory]) {
if (![self _checkSandboxedPath:srcAbsolutePath]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", srcRelativePath];
}
@ -254,7 +259,7 @@ static inline BOOL _IsMacFinder(GCDWebServerRequest* request) {
}
dstRelativePath = [[dstRelativePath substringFromIndex:(range.location + range.length)] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString* dstAbsolutePath = [_uploadDirectory stringByAppendingPathComponent:dstRelativePath];
if (![dstAbsolutePath hasPrefix:_uploadDirectory]) {
if (![self _checkSandboxedPath:dstAbsolutePath]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", srcRelativePath];
}
@ -425,7 +430,7 @@ static inline xmlNodePtr _XMLChildWithName(xmlNodePtr child, const xmlChar* name
NSString* relativePath = request.path;
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
BOOL isDirectory = NO;
if (![absolutePath hasPrefix:_uploadDirectory] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
if (![self _checkSandboxedPath:absolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
@ -475,7 +480,7 @@ static inline xmlNodePtr _XMLChildWithName(xmlNodePtr child, const xmlChar* name
NSString* relativePath = request.path;
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
BOOL isDirectory = NO;
if (![absolutePath hasPrefix:_uploadDirectory] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
if (![self _checkSandboxedPath:absolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
@ -575,7 +580,7 @@ static inline xmlNodePtr _XMLChildWithName(xmlNodePtr child, const xmlChar* name
NSString* relativePath = request.path;
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
BOOL isDirectory = NO;
if (![absolutePath hasPrefix:_uploadDirectory] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
if (![self _checkSandboxedPath:absolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}

28
GCDWebUploader/GCDWebUploader.m
View File

@ -57,6 +57,11 @@
@implementation GCDWebUploader (Methods)
// Must match implementation in GCDWebDAVServer
- (BOOL)_checkSandboxedPath:(NSString*)path {
return [[path stringByStandardizingPath] hasPrefix:_uploadDirectory];
}
- (BOOL)_checkFileExtension:(NSString*)fileName {
if (_allowedExtensions && ![_allowedExtensions containsObject:[[fileName pathExtension] lowercaseString]]) {
return NO;
@ -85,8 +90,8 @@
- (GCDWebServerResponse*)listDirectory:(GCDWebServerRequest*)request {
NSString* relativePath = [[request query] objectForKey:@"path"];
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
BOOL isDirectory;
if (![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
BOOL isDirectory = NO;
if (![self _checkSandboxedPath:absolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
if (!isDirectory) {
@ -129,8 +134,8 @@
- (GCDWebServerResponse*)downloadFile:(GCDWebServerRequest*)request {
NSString* relativePath = [[request query] objectForKey:@"path"];
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
BOOL isDirectory;
if (![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
BOOL isDirectory = NO;
if (![self _checkSandboxedPath:absolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
if (isDirectory) {
@ -160,6 +165,9 @@
}
NSString* relativePath = [[request firstArgumentForControlName:@"path"] string];
NSString* absolutePath = [self _uniquePathForPath:[[_uploadDirectory stringByAppendingPathComponent:relativePath] stringByAppendingPathComponent:file.fileName]];
if (![self _checkSandboxedPath:absolutePath]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
if (![self shouldUploadFileAtPath:absolutePath withTemporaryFile:file.temporaryPath]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_Forbidden message:@"Uploading file \"%@\" to \"%@\" is not permitted", file.fileName, relativePath];
@ -181,13 +189,16 @@
- (GCDWebServerResponse*)moveItem:(GCDWebServerURLEncodedFormRequest*)request {
NSString* oldRelativePath = [request.arguments objectForKey:@"oldPath"];
NSString* oldAbsolutePath = [_uploadDirectory stringByAppendingPathComponent:oldRelativePath];
BOOL isDirectory;
if (![[NSFileManager defaultManager] fileExistsAtPath:oldAbsolutePath isDirectory:&isDirectory]) {
BOOL isDirectory = NO;
if (![self _checkSandboxedPath:oldAbsolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:oldAbsolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", oldRelativePath];
}
NSString* newRelativePath = [request.arguments objectForKey:@"newPath"];
NSString* newAbsolutePath = [self _uniquePathForPath:[_uploadDirectory stringByAppendingPathComponent:newRelativePath]];
if (![self _checkSandboxedPath:newAbsolutePath]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", newRelativePath];
}
NSString* itemName = [newAbsolutePath lastPathComponent];
if ((!_allowHidden && [itemName hasPrefix:@"."]) || (!isDirectory && ![self _checkFileExtension:itemName])) {
@ -215,7 +226,7 @@
NSString* relativePath = [request.arguments objectForKey:@"path"];
NSString* absolutePath = [_uploadDirectory stringByAppendingPathComponent:relativePath];
BOOL isDirectory = NO;
if (![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
if (![self _checkSandboxedPath:absolutePath] || ![[NSFileManager defaultManager] fileExistsAtPath:absolutePath isDirectory:&isDirectory]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
@ -244,6 +255,9 @@
- (GCDWebServerResponse*)createDirectory:(GCDWebServerURLEncodedFormRequest*)request {
NSString* relativePath = [request.arguments objectForKey:@"path"];
NSString* absolutePath = [self _uniquePathForPath:[_uploadDirectory stringByAppendingPathComponent:relativePath]];
if (![self _checkSandboxedPath:absolutePath]) {
return [GCDWebServerErrorResponse responseWithClientError:kGCDWebServerHTTPStatusCode_NotFound message:@"\"%@\" does not exist", relativePath];
}
NSString* directoryName = [absolutePath lastPathComponent];
if (!_allowHidden && [directoryName hasPrefix:@"."]) {