Advisory Details

August 14th, 2018

Microsoft Exchange Server Voicemail Transcription Improper Access Control Remote Code Execution Vulnerability

CVE ID	CVE-2018-8302
CVSS SCORE	9.0, AV:N/AC:L/Au:S/C:C/I:C/A:C
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Exchange
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The specific flaw exists within the conversion of voicemails to text. Due to improper access control, an attacker who has access to a voicemail-enabled Exchange account can install alternative software to be invoked for voicemail transcription. An attacker can leverage this vulnerability to execute code under the context of SYSTEM.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8302
DISCLOSURE TIMELINE	2018-05-08 - Vulnerability reported to vendor 2018-08-14 - Coordinated public release of advisory 2018-08-14 - Advisory Updated
CREDIT	Anonymous

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