Advisory Details

April 18th, 2018

Oracle VirtualBox crUnpackExtendLockArraysEXT Out-Of-Bounds Write Privilege Escalation Vulnerability

CVE ID	CVE-2018-2836
CVSS SCORE	6.9, AV:L/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Oracle
AFFECTED PRODUCTS	VirtualBox
VULNERABILITY DETAILS	This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Oracle VirtualBox. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the crUnpackExtendLockArraysEXT method. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated object. An attacker can leverage this vulnerability to escalate privileges and execute code under the context of the hypervisor.
ADDITIONAL DETAILS	Oracle has issued an update to correct this vulnerability. More details can be found at: http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
DISCLOSURE TIMELINE	2018-01-26 - Vulnerability reported to vendor 2018-04-18 - Coordinated public release of advisory 2018-04-18 - Advisory Updated
CREDIT	Vasily Vasiliev

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