#microsoft

**How could an attacker exploit this vulnerability?** An unauthenticated attacker could attack a Microsoft Protected Extensible Authentication Protocol (PEAP) Server by sending specially crafted malicious PEAP packets over the network.

**What kind of security feature could be bypassed by successfully exploiting this vulnerability?** An attacker who successfully exploited this vulnerability could bypass certificate validation mechanisms and provide arbitrary certificates that do not have proper signatures.

**According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?** The user would have to click on a specially crafted URL to be compromised by the attacker.

**According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?** The user would have to click on a specially crafted URL to be compromised by the attacker.

**According to the CVSS metric, privileges required is low (PR:L). Does the attacker need to be in an authenticated role on the Exchange Server?** Yes, the attacker must be authenticated with LAN-access and have credentials for a valid Exchange user.

**According to the CVSS metric, privileges required is low (PR:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires the attacker must be an authenticated user on the network who is a member of the performance log users group. Although this group defaults to only Administrators, it is possible for an Administrator to add other standard users to this group.

**According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?** The word **Remote** in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. For example, when the score indicates that the **Attack Vector** is **Local** and **User Interaction** is **Required**, this could describe an exploit in which an attacker, through social engineering, convinces a victim to download and open a specially crafted file from a website which leads to a local attack on their computer.

**According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H), integrity (I:H) and availability (A:H). What does that mean for this vulnerability?** An attacker who successfully exploited this vulnerability could access a user's Net-NTLMv2 hash which could be used as a basis of an NTLM Relay attack against another service to authenticate as the user.

**How could an attacker exploit this vulnerability?** For the vulnerability to be exploited, the attacker would need to be authenticated as a valid exchange user.

**How could an attacker exploit this vulnerability?** In a network-based attack, an authenticated attacker could execute code remotely within the SharePoint Server.