Detections
Analytics
CVE-2017-2671
medium
Description
The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a socket system call.
References
https://usn.ubuntu.com/3754-1/
https://twitter.com/danieljiang0415/status/845116665184497664
https://github.com/torvalds/linux/commit/43a6684519ab0a6c52024b5e25322476cabad893
https://github.com/danieljiang0415/android_kernel_crash_poc
https://access.redhat.com/errata/RHSA-2018:1854
https://access.redhat.com/errata/RHSA-2017:2669
https://access.redhat.com/errata/RHSA-2017:2077
https://access.redhat.com/errata/RHSA-2017:1842