#Windows Kerberos

Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.

Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network.

**How could an attacker exploit this vulnerability?** When multiple attack vectors can be used, we assign a score based on the scenario with the higher risk. In one such scenario for this vulnerability, the attacker could convince a victim to connect to an attacker controlled malicious application (for example, SMB) server. Upon connecting, the malicious server could compromise the protocol.

**According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability?** To successfully exploit this vulnerability, an attacker would need to have elevated access to certain attributes of the dMSA, specifically: * msds-groupMSAMembership: This attribute allows the user to utilize the dMSA. * msds-ManagedAccountPrecededByLink: The attacker needs write access to this attribute, which allows them to specify a user that the dMSA can act on behalf of.

Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service over a network.

**Are the updates for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems currently available?** The security update for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems are not immediately available. The updates will be released as soon as possible, and when they are available, customers will be notified via a revision to this CVE information.

**How could an attacker exploit this vulnerability?** An authenticated attacker could exploit this vulnerability by establishing a machine-in-the-middle (MITM) attack or other local network spoofing technique, then sending a malicious Kerberos message to the client victim machine to spoof itself as the Kerberos authentication server.

Uncontrolled resource consumption in Windows Kerberos allows an unauthorized attacker to deny service over a network.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to win a race condition.

**How could an attacker exploit this vulnerability?** An unauthenticated attacker could use a specially crafted application to leverage a protocol vulnerability in Windows Kerberos to perform a denial of service attack against the target.