Udisks: out-of-bounds read in udisks daemon

A flaw was found in the Udisks daemon, where it allows unprivileged users to create loop devices using the D-BUS system. This is achieved via the loop device handler, which handles requests sent through the D-BUS interface. As two of the parameters of this handle, it receives the file descriptor list and index specifying the file where the loop device should be backed. The function itself validates the index value to ensure it isn't bigger than the maximum value allowed. However, it fails to validate the lower bound, allowing the index parameter to be a negative value. Under these circumstances, an attacker can cause the UDisks daemon to crash or perform a local privilege escalation by gaining access to files owned by privileged users.

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

跨界内存读

udisks 缓冲区错误漏洞

udisks是一款用于查询和管理存储设备的守护程序。 udisks存在缓冲区错误漏洞，该漏洞源于未验证索引下限，可能导致本地权限提升。

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