Note:
This project will be discontinued after December 13, 2021. [more]
2018-06-24
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.
Products | Linux_kernel |
Type | Out-of-bounds Write (CWE-787) |
First patch |
https://github.com/torvalds/linux/commit/81f9c4e4177d31ced6f52a89bb70e93bfb77ca03 |
Relevant file/s |
• ./Documentation/trace/histogram.txt (modified, +12, -11)
• ./kernel/softirq.c (modified, +5, -1) • ./kernel/trace/trace.c (modified, +1, -5) • ./kernel/trace/trace_events_filter.c (modified, +9, -1) • ./scripts/Makefile.build (modified, +1, -1) |
Links |
• http://www.securityfocus.com/bid/104544
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81f9c4e4177d31ced6f52a89bb70e93bfb77ca03 • https://github.com/lcytxw/bug_repro/tree/master/bug_200019 • https://bugzilla.kernel.org/show_bug.cgi?id=200019 |
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