UBUNTU-CVE-2018-12714

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UBUNTU-CVE-2018-12714

Summary:

Details: An issue was discovered in the Linux kernel through 4.17.2. The filter parsing in kernel/trace/trace_events_filter.c could be called with no filter, which is an N=0 case when it expected at least one line to have been read, thus making the N-1 index invalid. This allows attackers to cause a denial of service (slab out-of-bounds write) or possibly have unspecified other impact via crafted perf_event_open and mmap system calls.

References: https://ubuntu.com/security/CVE-2018-12714, http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81f9c4e4177d31ced6f52a89bb70e93bfb77ca03, https://bugzilla.kernel.org/show_bug.cgi?id=200019, https://github.com/lcytxw/bug_repro/tree/master/bug_200019, https://github.com/torvalds/linux/commit/81f9c4e4177d31ced6f52a89bb70e93bfb77ca03, https://www.cve.org/CVERecord?id=CVE-2018-12714