diff options
Diffstat (limited to 'node')
| -rw-r--r-- | node/SoftwareUpdater.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/node/SoftwareUpdater.cpp b/node/SoftwareUpdater.cpp index 02da55db..8a9714fc 100644 --- a/node/SoftwareUpdater.cpp +++ b/node/SoftwareUpdater.cpp @@ -202,6 +202,11 @@ void SoftwareUpdater::_cbHandleGetLatestVersionBinary(void *arg,int code,const s } std::string updatesDir(_r->homePath + ZT_PATH_SEPARATOR_S + "updates.d"); std::string updateFilename(url.substr(lastSlash + 1)); + if ((updateFilename.length() < 3)||(updateFilename.find("..") != std::string::npos)) { + LOG("software update failed: invalid URL: filename contains invalid characters"); + upd->_status = UPDATE_STATUS_IDLE; + return; + } for(std::string::iterator c(updateFilename.begin());c!=updateFilename.end();++c) { // Only allow a list of whitelisted characters to make up the filename to prevent any // path shenanigans, esp on Windows where / is not the path separator. |