The packet_set_ring function in net/packet/af_packet.c in the Linux kernel up to and including 4.10.6 does not properly validate certain block-size data, which allows local users to cause a denial of service (integer signedness error and out-of-bounds write), or gain privileges (if the CAP_NET_RAW capability is held), via crafted system calls.
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linux linux kernel |
Silently side-step software safeguards
Video Boffins in America, the Netherlands, and Switzerland have devised a Spectre-style attack on modern processors that can defeat defenses that are supposed to stop malicious software from hijacking a computer's operating system. The end result is exploit code able to bypass a crucial protection mechanism and take over a device to hand over root access. That's a lot to unpack so we'll start from the top. Let's say you find a security vulnerability, such as a buffer overflow, in the kernel of a...