VOMIT (go/vomit) has received an external vulnerability report for the Linux kernel.
Advisory: CVE-2018-1108
Details: http://vomit.googleplex.com/advisory?id=CVE/CVE-2018-1108
CVSS severity score: 4.3/10.0
Description:
kernel drivers before version 4.17-rc1 are vulnerable to a weakness in the Linux kernel's implementation of random seed data. Programs, early in the boot sequence, could use the data allocated for the seed before it was sufficiently generated.
This bug was filed by http://go/vomit
Please contact us at vomit-team@google.com if you need any assistance.
Comment 1 by groeck@chromium.org
, Jun 27 2018Labels: Security_Impact-Stable Security_Severity-Medium Pri-1
Owner: groeck@chromium.org
Status: WontFix (was: Untriaged)
Fixes are commit 8ef35c866f8 ("random: set up the NUMA crng instances after the CRNG is fully initialized"), dc12baacb95f205 ("random: use a different mixing algorithm for add_device_randomness()"), and 43838a23a05fb ("random: fix crng_ready() test"), all of which are available in chromeos-4.4 and chromeos-4.14. The fixes have possible side effects and can result in boot times of several minutes for Chrome OS, especially if there is no TPM in the system and if the system has not been patched to give the TPM's RNG a high quality rating (which is the case in all Chrome OS releases). Given that, and the possible regression (boot time increase), applying the relevant patches to older kernels is too risky. Marking as WontFix.