cve/2017/CVE-2017-5669.md

CVE-2017-5669

Description

The do_shmat function in ipc/shm.c in the Linux kernel through 4.9.12 does not restrict the address calculated by a certain rounding operation, which allows local users to map page zero, and consequently bypass a protection mechanism that exists for the mmap system call, by making crafted shmget and shmat system calls in a privileged context.

POC

Reference

• https://bugzilla.kernel.org/show_bug.cgi?id=192931
• https://usn.ubuntu.com/3583-2/

Github

• https://github.com/omniosorg/lx-port-data