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Salut, folosesc Windows 10 Home si am uitat parola de la contul de administrator si m-am logat pe guest dar pe guest nu ma lasa sa folosesc comanda net user si nici sa instalez sau descarc programe pe el. Precizez ca am si K9 instalat pe el si am uitat parola si de la ala si nu ma lasa sa sterg sau mut bckd.sys din system32 ca sa fac bypass. Este vreo metoda sa reusesc sa fac bypass la K9 sau sa ma loghez in Contul de administrator ? (fara a avea nevoie de un Cd de reinstalare sau chestii dinastea, doar din cmd sau eu stiu..)
There's an extremely critical bug in the Xen, KVM, and native QEMU virtual machine platforms and appliances that makes it possible for attackers to break out of protected guest environments and take full control of the operating system hosting them, security researchers warned Wednesday. The vulnerability is serious because it pierces a key protection that many cloud service providers use to segregate one customer's data from another's. If attackers with access to one virtualized environment can escape to the underlying operating system, they could potentially access all other virtual environments. In the process, they would be undermining one of the fundamental guarantees of virtual machines. Compounding the severity, the vulnerability resides in a low-level disk controller, allowing it to be exploited when guest or host OSes alike run Linux, Windows, Mac OS X, or possibly other OSes. Researchers from security firm CrowdStrike, who first warned of the vulnerability, wrote: The vulnerability is the result of a buffer-overflow bug in QEMU's virtual Floppy Disk Controller, which is used in a variety of virtualization platforms and appliances. It is known to affect Xen, KVM, and the native QEMU client software, and it may affect others. VMware, Microsoft Hyper-V, and Bochs hypervisors are not affected. At publication time, patches were available from the Xen Project and the QEMU Project. RedHat has a patch here. There are also workarounds users can follow to lessen the risk of exploitation. The vulnerability is serious enough that users of other virtualization packages should immediately contact the developers to find out if they're susceptible. The bug has existed since 2004. There's no indication that the vulnerability is being actively exploited maliciously in the wild. Although the vulnerability is agnostic of the OS running both the guest and host, attack code exploiting the bug must have administrative or root privileges to the guest. The threat is greatest for people who rely on virtual private servers, which allow service providers to host multiple operating systems on a single physical server. Because virtual servers are often provided to different customers, it's common that they have administrative or root privileges to that guest OS that could be used to take over the underlying machine. CrowdStrike's advisory went on to state: For those who are unable to patch vulnerable software, CrowdStrike offered the following: The vulnerability has been dubbed Venom, short for virtualized environment neglected operations manipulation. Some people are already comparing its severity to Heartbleed, the catastrophic bug disclosed in April 2014 that exposed private cryptography keys, end-user passwords, and other sensitive data belonging to countless services that used the OpenSSL crypto library. At this early stage, it's too early to know if the comparison to Heartbleed is exaggerated, since at the moment there's no indication that Venom is being actively exploited. Tod Beardsley, a research manager at vulnerability assessment provider Rapid7, has indicated that the threat from Venom is likely not as serious. In an e-mailed statement, he wrote: Those limitations aside, there's an extremely broad range of platforms that are vulnerable to this exploit, and those platforms house servers used by banks, e-commerce providers, and countless other sensitive services. Given the large number of servers that are vulnerable and the extremely high value of the assets they contain, this security bug should be considered a top priority. Source