Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 2 |
CVE-ID | CVE-2019-1166 CVE-2019-1338 |
CWE-ID | CWE-300 |
Exploitation vector | Local 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 information about 2 vulnerabilities.
EUVDB-ID: #VU21684
Risk: Medium
CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2019-1166
CWE-ID:
CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to tamper with the NTLM exchange.
The vulnerability exists due to insufficient integrity check for NTLM packets. A remote attacker can modify flags of the NTLM packet without invalidating the signature and bypass the NTLM MIC (Message Integrity Check) protection.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWindows: 7 - 10 1903 10.0.18362.116
Windows Server: 2008 - 2019 1903
CPE2.3https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1166
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU21685
Risk: Medium
CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2019-1338
CWE-ID:
CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to tamper with the NTLMv2 exchange.
The vulnerability exists due to insufficient integrity check for NTLMv2 packets, when the client is also sending LMv2 responses. A remote attacker with ability to modify NTLM traffic exchange can bypass the NTLMv2 protection and gain the ability to downgrade NTLM security features.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWindows: 7
Windows Server: 2008 - 2008 R2
CPE2.3 External linkshttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1338
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.