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The lingering security risks of cloud storage are still very much in the minds of CTOs and CIOs despite providers’ best efforts to up their game in keeping the average user safe from attack. Unfortunately one such vulnerability has now been spotted – after lurking in the grass since 2004! It goes by the name of VENOM: Virtualized Environment Neglected Operations Manipulation (CVE-2015-3456).
Discovered by Jason Geffner at CrowdStrike around end April/beginning May 2015, the vulnerability exists in the Floppy Drive Controller of a virtual machine (VM). If exploited (click here for the technical “codey” bits), the attacker could get access to the hosting server via the VM. This, in turn, can result in other VMs on the same server also being compromised.
It is the open-source QEMU implementation of machine emulation and virtualisation that is affected by the VENOM security vulnerability. This is, however, no cause to rest easy because many hypervisor providers make use of this in their solutions like VirtualBox, KVM, Xen, Win4Lin Pro Desktop, and also derivatives of these products.
Seeing that their software is used so widely – possibly impacting millions of users – there was significant haste between providers and community contributors to try and find a solution. According to CrowdStrike, the following providers have issued responses and/or patches for the VENOM security vulnerability: QEMU, Xen Project, Red Hat, Citrix, FireEye, Linode, Rackspace, Ubuntu, Debian, SUSE, DigitalOcean, f5, Joyent, Liquid Web, UpCloud, Amazon, Oracle, Barracuda Networks, CentOS, Fortinet, and IBM.
In the meantime, make sure you have the basics in place: a solid disaster recovery plan and some solid data protection software to back it up (pun intended). With the VENOM security vulnerability possibly allowing access to a multitude of presumed secure VMs and hosting servers, your company’s intellectual capital is at risk and the data it’s founded on could be wiped should an attacker or their malware gain access. Know where your critical data resides and know how to protect it.
Speaking of protection, a disaster recovery plan is a lame duck without some decent backups. Should your cloud storage provider still be susceptible to the VENOM security vulnerability, using software that is able to replicate/mirror backups will help mitigate this. Although, it could be that the reason you’re storing backups in the cloud is because they’re already a redundant copy of your local backups. In this case, more is more.
It would be best to consult your provider to be sure where they stand on the matter. Also stay up to date by following https://venom.crowdstrike.com/.
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