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lundi 8 octobre 2018

Microsoft Edge Security Feature Same-Origin Policy privilege escalation

A vulnerability was found in Microsoft Edge (the affected version is unknown). It has been declared as critical. Affected by this vulnerability is an unknown function of the component Security Feature. The manipulation with an unknown input leads to a privilege escalation vulnerability (Same-Origin Policy). The CWE definition for the vulnerability is CWE-942. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 10/09/2018 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The public release has been coordinated with Microsoft. This vulnerability is known as CVE-2018-8530. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $25k-$100k at the moment (estimation calculated on 10/10/2018). It expected to see the exploit prices for this product increasing in the near future. The advisory points out:

A security feature bypass vulnerability exists when Microsoft Edge improperly handles requests of different origins. The vulnerability allows Microsoft Edge to bypass Same-Origin Policy (SOP) restrictions, and to allow requests that should otherwise be ignored. An attacker who successfully exploited the vulnerability could force the browser to send data that would otherwise be restricted.

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

CPE

CVSSv3

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

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

Vendor Base Score (Microsoft): 4.3
Vendor Vector (Microsoft): 🔒

CVSSv2

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

Exploiting

Class: Privilege escalation / Same-Origin Policy (CWE-942)
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-2018-8530 (🔒)

Entry

Created: 10/10/2018
Complete: 🔍

Lien vers l'article source

Auteur: VulDB

Catégories: VulDBNombre de vues: 256

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