Information disclosure in Microsoft SQL Server Management Studio

Published: 2018-10-09

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-8532 CVE-2018-8533
CWE-ID	CWE-611
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Microsoft SQL Server Management Studio Client/Desktop applications / Software for system administration
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) XXE attack

EUVDB-ID: #VU15262

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-8532

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to conduct XXE-attack.

The vulnerability exists due to an error when parsing a malicious XMLA file containing a reference to an external entity. A remote attacker can trick the victim into opening a specially crafted XML file and gain access to potentially sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SQL Server Management Studio: 17.9 - 18.0 (Preview 4)

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8532
http://hyp3rlinx.altervista.org/advisories/MICROSOFT-SQL-SERVER-MGMT-STUDIO-XMLA-FILETYPE-XML-INJECT...

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) XXE attack

EUVDB-ID: #VU15263