Date: Thu, 19 Jan 2017 16:42:09 +0530 (IST) From: P J P <ppandit@...hat.com> To: oss security list <oss-security@...ts.openwall.com> cc: Xiaohan Zhang <zhangxiaohan1@...wei.com> Subject: CVE-2017-2583 Kernel: Kvm: vmx/svm potential privilege escalation inside guest Hello, Linux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM) support is vulnerable an incorrect segment selector(SS) value error. It could occur loading values into SS register in long mode. A user/process inside guest could use this flaw to crash the guest resulting in DoS or potentially escalate their privileges inside guest. Upstream patch: --------------- -> https://git.kernel.org/linus/33ab91103b3415e12457e3104f0e4517ce12d0f3 Reference: ---------- -> https://bugzilla.redhat.com/show_bug.cgi?id=1414735 Note: On Intel CPUs it'd corrupt the guest state resulting in DoS; Whereas on AMD CPUs it could potentially escalate privileges inside guest. This issue was discovered by Xiaohan Zhang of Huawei Inc. 'CVE-2017-2583' was assigned to this issue by Red Hat Inc. Thank you. -- Prasad J Pandit / Red Hat Product Security Team 47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F
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