Authentication bypass in Active Directory Federation Services
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2018-8340 |
| CWE-ID | CWE-592 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Windows Server Operating systems & Components / Operating system |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Authentication bypass
EUVDB-ID: #VU14377
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-8340
CWE-ID:
CWE-592 - Authentication Bypass Issues
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass certain authentication factors.
The vulnerability exists due to an error when processing multi-factor authentication requests within Active Directory Federation Services (AD FS). A remote attacker can bypass certain authentication factors during multi-factor authentication and gain unauthorized access to sensitive data and functionality.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWindows Server: 2012 R2 - 2016
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8340
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.
