Tag
#Security Vulnerability
**Are there any more actions I need to take to be protected from this vulnerability?** Yes. Customers vulnerable to this issue would need to enable Extended Protection in order to prevent this attack. For more information, see Exchange Server Support for Windows Extended Protection **Is there more information available about this release of Exchange Server?** For more information on this issue, please see The Exchange Blog.
**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.
**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 successfully execute a blind XXE attack.
**What privileges could an attacker gain?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
**How could an attacker exploit this vulnerability?** In most situations, an unauthenticated attacker could send a specially crafted packet to a targeted server utilizing the Server Name Indication (SNI) over HTTP Protocol Stack (http.sys) to process packets, causing a denial of service (DOS).
**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.
**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.
**What privileges could an attacker gain?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
**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.
**What type of privileges could an attacker gain through this vulnerability?** A domain user could use this vulnerability to elevate privileges to SYSTEM assigned integrity level.