Advisory Details

October 10th, 2018

Microsoft SQL Server Management Studio xel File XML External Entity Processing Information Disclosure Vulnerability

CVE ID	CVE-2018-8527
CVSS SCORE	2.6, AV:N/AC:H/Au:N/C:P/I:N/A:N
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	SQL Server Management Studio
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft SQL Server Management Studio. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of XEL files. Due to the improper restriction of XML External Entity (XXE) references, a specially crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the current process.
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-2018-8527
DISCLOSURE TIMELINE	2018-06-07 - Vulnerability reported to vendor 2018-10-10 - Coordinated public release of advisory 2018-10-10 - Advisory Updated
CREDIT	John Page (aka hyp3rlinx) - ApparitionSec

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