Advisory Details

September 10th, 2019

Microsoft SharePoint Business Data Connectivity Service Deserialization of Untrusted Data Remote Code Execution Vulnerability

CVE ID	CVE-2019-1257
CVSS SCORE	8.8, AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	SharePoint
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft SharePoint. Authentication is required to exploit this vulnerability. The specific flaw exists within the Business Data Connectivity Service. A crafted request can trigger the deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the SharePoint application pool identity.
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-2019-1257
DISCLOSURE TIMELINE	2019-07-03 - Vulnerability reported to vendor 2019-09-10 - Coordinated public release of advisory
CREDIT	Markus Wulftange (@mwulftange)

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