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lundi 8 octobre 2018

Microsoft SQL Server Management Studio 17.9/18.0 Preview 4 XMLA File xxe privilege escalation

A vulnerability classified as critical has been found in Microsoft SQL Server Management Studio 17.9/18.0 Preview 4. This affects an unknown function of the component XMLA File Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability (xxe). CWE is classifying the issue as CWE-269. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 10/09/2018 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with Microsoft. This vulnerability is uniquely identified as CVE-2018-8532. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/10/2018). The advisory points out:

An information disclosure vulnerability exists in Microsoft SQL Server Management Studio (SSMS) when parsing a malicious XMLA file containing a reference to an external entity. An attacker who successfully exploited this vulnerability could read arbitrary files via an XML external entity declaration.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The entries 125124 and 125129 are pretty similar.

CPE

CVSSv3

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploiting

Class: Privilege escalation / xxe (CWE-269)
Local: No
Remote: Yes

Availability: No

Price Prediction: 🔍
Current Price Estimation: 🔒

Threat Intelligence

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Actions: 🔍

Countermeasures

Recommended: Patch
Status: Official fix
Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Timeline

10/09/2018 Advisory disclosed
10/09/2018 Countermeasure disclosed
10/10/2018 VulDB entry created
10/10/2018 VulDB last update

Sources

Advisory: portal.msrc.microsoft.com
Status: Confirmed
Coordinated: 🔒

CVE: CVE-2018-8532 (🔒)
See also: 🔒

Entry

Created: 10/10/2018
Complete: 🔍

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Auteur: VulDB

Catégories: VulDBNombre de vues: 487

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