Advisory Details

July 18th, 2018

Oracle VirtualBox SHCRGL_GUEST_FN_WRITE_READ_BUFFERED Uninitialized Memory Information Disclosure Vulnerability

CVE ID	CVE-2018-3091
CVSS SCORE	4.7, AV:L/AC:M/Au:N/C:C/I:N/A:N
AFFECTED VENDORS	Oracle
AFFECTED PRODUCTS	VirtualBox
VULNERABILITY DETAILS	This vulnerability allows local attackers to disclose sensitive information 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 SHCRGL_GUEST_FN_WRITE_READ_BUFFERED method. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities 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/cpujul2018-4258247.html
DISCLOSURE TIMELINE	2018-06-08 - Vulnerability reported to vendor 2018-07-18 - Coordinated public release of advisory 2018-07-18 - Advisory Updated
CREDIT	Niklas Baumstark

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