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Flatpak before 1.0.8, 1.1.x and 1.2.x before 1.2.4, and 1.3.x before 1.3.1 allows a sandbox bypass. Flatpak versions since 0.8.1 address CVE-2017-5226 by using a seccomp filter to prevent sandboxed apps from using the TIOCSTI ioctl, which could otherwise be used to inject commands into the controlling terminal so that they would be executed outside the sandbox after the sandboxed app exits. This fix was incomplete: on 64-bit platforms, the seccomp filter could be bypassed by an ioctl request number that has TIOCSTI in its 32 least significant bits and an arbitrary nonzero value in its 32 most significant bits, which the Linux kernel would treat as equivalent to TIOCSTI.

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Flatpak 输入验证错误漏洞

Flatpak是一套用于Linux桌面应用计算机环境的应用程序虚拟化系统。 Flatpak中存在安全特征问题漏洞，该漏洞是源于网络系统或产品中缺少身份验证、访问控制、权限管理等安全措施。以下版本受到影响：Flatpak 1.0.8之前版本，1.1.x版本，1.2.4之前的1.2.x版本，1.3.1之前的1.3.x版本。

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