Microsoft Security Response Center

**According to the CVSS, the attack vector is Adjacent. What does that mean and how is that different from a Network vector?** This vulnerability's attack is limited at the protocol level to a logically adjacent topology. This means it cannot simply be done across the internet, but instead needs something specific tied to the target. Good examples would include the same shared physical network (such as Bluetooth or IEEE 802.11), logical network (local IP subnet), or from within a secure or otherwise limited administrative domain (MPLS, secure VPN to an administrative network zone). This is common to many attacks that require man-in-the-middle type setups or that rely on initially gaining a foothold in another environment.

**According to the score, the attack vector is Physical. How would an attacker exploit this vulnerability?** To exploit this vulnerability, an attacker with physical access to a vulnerable system could insert a specially crafted USB device. **Are there additional attack vectors?** This vulnerability can also be exploited through a Local attack vector. An attacker authenticated as an administrator on a vulnerable system could mount a specially crafted virtual hard drive (VHD) to exploit the system. This scenario results in a lower CVSS score which is why the primary attack vector is listed as Physical in our documentation.

**According to the score, the attack vector is Physical. How would an attacker exploit this vulnerability?** To exploit this vulnerability, an attacker with physical access to a vulnerable system could insert a specially crafted USB device. **Are there additional attack vectors?** This vulnerability can also be exploited through a Local attack vector. An attacker authenticated as an administrator on a vulnerable system could mount a specially crafted virtual hard drive (VHD) to exploit the system. This scenario results in a lower CVSS score which is why the primary attack vector is listed as Physical in our documentation.

**What type of information could be disclosed by this vulnerability?** An attacker that successfully exploited this vulnerability could recover cleartext passwords from memory.

**According to the score, the attack vector is Physical. How would an attacker exploit this vulnerability?** To exploit this vulnerability, an attacker with physical access to a vulnerable system could insert a specially crafted USB device. **Are there additional attack vectors?** This vulnerability can also be exploited through a Local attack vector. An attacker authenticated as an administrator on a vulnerable system could mount a specially crafted virtual hard drive (VHD) to exploit the system. This scenario results in a lower CVSS score which is why the primary attack vector is listed as Physical in our documentation.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.

**What configurations or versions could be at risk from this vulnerability?** This bypass could affect any Hyper-V configurations that are using Router Guard. **What is the exposure if the vulnerability was bypassed?** Certain packets that would normally be blocked or dropped could be processed. This could allow an attacker to bypass set policy, potentially influencing router paths.

**How would an attacker exploit this vulnerability?** An attacker would have to convince a targeted user to connect to a malicious RDP server. Upon connecting, the malicious server could read or tamper with clipboard contents and the victim's filesystem contents.

**Are the any prerequisites to a successful attack?** Yes, only systems with the IPSec service running are vulnerable to this attack.