Vulnerability Information
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Vulnerability Title
Filenames not escaped by default in controllers using DownloadResponse
Vulnerability Description
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, filenames where not escaped by default in controllers using `DownloadResponse`. When a user-supplied filename was passed unsanitized into a `DownloadResponse`, this could be used to trick users into downloading malicious files with a benign file extension. This would show in UI behaviours where Nextcloud applications would display a benign file extension (e.g. JPEG), but the file will actually be downloaded with an executable file extension. The vulnerability is patched in versions 19.0.13, 20.0.11, and 21.0.3. Administrators of Nextcloud instances do not have a workaround available, but developers of Nextcloud apps may manually escape the file name before passing it into `DownloadResponse`.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Vulnerability Type
对输出编码和转义不恰当
Vulnerability Title
Nextcloud 输入验证错误漏洞
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Server 中存在输入验证错误漏洞，该漏洞源于 DownloadResponse 没有对上传文件名做安全检查，攻击者可通过该漏洞诱导用户下载具有正常文件名的恶意文件。以下产品及版本受到影响： Nextcloud Server 19.0.13 之前版本、20.0.11 之前版本、21.0.3 之前版本
CVSS Information
N/A
Vulnerability Type
N/A