Local Security Authority Subsystem Service Denial of Service Vulnerability



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-0004
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU4101

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-0004

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause denial of service conditions.

The vulnerability exists due to the way the Local Security Authority Subsystem Service (LSASS) handles authentication requests. A remote unauthenticated attacker can send a specially crafted authentication request to vulnerable system and trigger its automatic reboot.

Successful exploitation of the vulnerability will result in denial of service attack.

Mitigation

Install updates from Microsoft website.

Vulnerable software versions

Windows: Vista - 7

Windows Server: 2008 - 2008 R2

CPE2.3 External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0004


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.



###SIDEBAR###