Information disclosure in Azure Active Directory Microsoft Account

Published: 2019-08-13 | Updated: 2019-08-13
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-1172
CWE ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software Windows Subscribe
Windows Server
Vendor Microsoft

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Information disclosure

Severity: Medium

CVSSv3: 6.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-1172

CWE-ID: CWE-200 - Information Exposure

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists in Azure Active Directory (AAD) Microsoft Account (MSA) during the login request session due to insecure cookie handling. A remote attacker can trick the victim to visit a specially crafted website and steal user's cookie.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 8.1, 10, 10 1607, 10 1703, 10 1709, 10 1803, 10 1809, 10 1903, RT 8.1

Windows Server: 1803, 1903, 2012 R2, 2016, 2019

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1172

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.