Advisory Details

July 20th, 2020

Oracle VirtualBox e1000 Integer Underflow Privilege Escalation Vulnerability

ZDI-20-902
ZDI-CAN-11138

CVE ID CVE-2020-14699
CVSS SCORE 7.5, (AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H)
AFFECTED VENDORS Oracle
AFFECTED PRODUCTS VirtualBox
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability.

The specific flaw exists within the implementation of the e1000 virtual network adapter. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor.

ADDITIONAL DETAILS Oracle has issued an update to correct this vulnerability. More details can be found at:
https://www.oracle.com/security-alerts/cpujul2020.html
DISCLOSURE TIMELINE
  • 2020-06-04 - Vulnerability reported to vendor
  • 2020-07-20 - Coordinated public release of advisory
CREDIT ziming zhang from Codesafe Team of Legendsec at Qi'anxin Group
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