Tag Archives: VMware Workstation

Pwn2Own 2017 Results

The final day of competition within Pwn2Own 2017 took place on Friday, 17th March. Full details of how the individual teams performed and how many exploits were successful are available here , here and here.

In summary the following products were successfully exploited:

Adobe Flash
Adobe Reader
Apple Safari
Apple macOS (mostly the macOS kernel)(defined)
Microsoft Edge
Microsoft Windows kernel
Mozilla Firefox
Ubuntu Linux
VMware Workstation

The contest saw 51 vulnerabilities used and a total of USD$833,000 awarded to the contestants (a very large increase over last year’s USD$460K). As I noted last year, many vulnerabilities once again were present within the macOS and Windows kernels specifically:

Apple macOS kernel:
race condition (defined)
information disclosures (defined)
out of bounds (OOB) bug (defined)

Microsoft Windows kernel:
integer overflows (defined)
buffer overflows (defined)
uninitialised buffers (discussed here)
use-after-free (defined here and here)
information disclosures
out of bounds (OOB) bug
race condition

As before Microsoft and Apple need to do more thorough static analysis/auditing/fuzzing (defined here and here) of the kernel to find and resolve vulnerabilities before they are exploited. It is a surprise this year again highlights this short coming which secure coding practices e.g. Microsoft’s SDL and Adobe’s SPLC (among others) were intended to reduce.

Of note is; Mozilla Firefox released Firefox 52.0.1 to resolve an integer flow vulnerability in less than 1 day after it’s disclosure during Pwn2Own; a fantastic response time.

Update: 28th March 2017:
On the 28th of March, VMware made available security updates to address the vulnerabilities discovered during Pwn2Own.

Apple have also made available updates (listed in this post) to resolve the vulnerabilities discovered in Pwn2Own 2017. It is unclear if all vulnerabilities are now addressed.

Update: 11th April 2017:
In late March, the Linux kernel vulnerability disclosed during Pwn2Own was resolved very quickly with Ubuntu also releasing their fix for this issue.

Adobe have released updates for Flash and Acrobat/Reader to address what appears to be 5 vulnerabilities in Flash and 6  in Acrobat/Reader (assuming near sequential CVEs and the team names attributed top them) disclosed during Pwn2Own.

We can again look forward to these vulnerabilities being addressed over the coming months; helping to make our products more secure.

Thank you.

VMware Security Updates Address Elevation of Privilege Vulnerability

In the second half of last week VMware released security updates for the following products:

  • VMware ESXi 6.0 without patch ESXi600-201512102-SG
  • VMware ESXi 5.5 without patch ESXi550-201512102-SG
  • VMware ESXi 5.1 without patch ESXi510-201510102-SG
  • VMware ESXi 5.0 without patch ESXi500-201510102-SG
  • VMware Workstation prior to 11.1.2
  • VMware Player prior to 7.1.2
  • VMware Fusion prior to 7.1.2

These updates address elevation of privilege (the concept is defined here) security issue which has been assigned 1x CVE number, (defined). This vulnerability was responsibly disclosed (defined) by Dmitry Janushkevich from the Secunia Research Team to VMware.

Why Should This Issue Be Considered Important?
Since multiple VMware products have this vulnerability which could allow an attacker to escalate their level of privilege/access within the guest operating system (namely one or more of your virtual machines) this issue should be patched as soon as possible. The issue is due to memory corruption vulnerability within the kernel (defined) of the VMware Tools “Shared Folders” HGFS feature.

How Can I Protect Myself From This Issue?
VMware have released updates to resolve this issue within the affected products. Please refer to VMware’s security advisory to download the necessary updates.

Thank you.