Arbitrary code execution due to improper sanitization of web app properties in PWAsForFirefox

PWAsForFirefox is a tool to install, manage and use Progressive Web Apps (PWAs) in Mozilla Firefox. Due to improper sanitization of web app properties (such as name, description, shortcuts), web apps were able to inject additional lines into XDG Desktop Entries (on Linux) and `AppInfo.ini` (on PortableApps.com). This allowed malicious web apps to introduce keys like `Exec`, which could run arbitrary code when the affected web app was launched. This vulnerability affects all Linux and PortableApps.com users of all PWAsForFirefox versions up to (excluding) 2.12.0. Windows and macOS users are not affected. This vulnerability has been fixed in commit `9932d4b` which has been included in release in v2.12.0. The main fix is implemented in the native part, but the extension also contains additional fixes. All Linux and PortableApps.com users are advised to update to this version as soon as possible. It is also recommended for Windows and macOS users to update to this version, as it contains additional fixes related to properties sanitization. There are no known workarounds for this vulnerability.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

输出中的特殊元素转义处理不恰当(注入)

PWAsForFirefox 安全漏洞

PWAsForFirefox是Filip Š个人开发者的一个在 Mozilla Firefox 中安装、管理和使用渐进式 Web 应用程序（PWA）的工具。 PWAsForFirefox v2.12.0之前版本存在安全漏洞，该漏洞源于对 Web 应用程序属性清理不当，Web 应用程序能够将额外的行注入到 XDG 和 AppInfo.ini，使恶意 Web 应用程序可以引入 Exec等密钥，这些密钥可以在受影响的 Web 应用程序启动时运行任意代码。

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