SCADA Vulnerabilities & Exposures (SVE)

CRITIFENCE® SCADA Vulnerabilities and Exposures Database (SVE)

[SVE-329204405] Meinberg NTP Time Server Vulnerabilities

Date Type Platform Author EDB-ID CVE-ID OSVDB-ID Download App SIS Signature
2016-06-23OTHERMultipleRyan WinceyN/A2016-3962, 2016-3988, 2016-3989N/AN/AN/A

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# Meinberg NTP Time Server Vulnerabilities
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### OVERVIEW

Independent researcher Ryan Wincey has identified a stack buffer overflow vulnerability and a privilege escalation vulnerability in Meinberg's NTP Time Servers Interface. Meinberg has produced a new Version 6.20.004 to mitigate these vulnerabilities. The researcher has validated the firmware update. He confirms the update fixes these vulnerabilities.

These vulnerabilities could be exploited remotely.




### AFFECTED PRODUCTS

The following Meinberg products are affected:
IMS-LANTIME M3000 Version 6.0 and earlier,
IMS-LANTIME M1000 Version 6.0 and earlier,
IMS-LANTIME M500 Version 6.0 and earlier,
LANTIME M900 Version 6.0 and earlier,
LANTIME M600 Version 6.0 and earlier,
LANTIME M400 Version 6.0 and earlier,
LANTIME M300 Version 6.0 and earlier,
LANTIME M200 Version 6.0 and earlier,
LANTIME M100 Version 6.0 and earlier,
SyncFire 1100 Version 6.0 and earlier, and
LCES Version 6.0 and earlier.






### IMPACT

Successful exploitation of these vulnerabilities could cause a buffer overflow condition that may allow escalation to root privileges.

Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation.






### BACKGROUND

Meinberg is a Germany-based company that maintains offices around the world, including North America, South America, Europe, Asia, Africa, and Australia.

The affected products are NTP Time Servers. According to Meinberg, IMS-LANTIME, LANTIME, SyncFire, and LCES Series are deployed across several sectors including Communications, Defense Industrial Base, Energy, Financial Services, Transportation Systems, and others. Meinberg estimates that these products are used worldwide.





### VULNERABILITY CHARACTERIZATION


# VULNERABILITY OVERVIEW

STACK-BASED BUFFER OVERFLOW

Remote stack buffer overflow vulnerability involving parsing of parameter in POST request in function provides privilege of web server "nobody."
CVE-2016-3962 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).




STACK-BASED BUFFER OVERFLOW

Remote stack buffer overflow vulnerability is present while parsing nine different parameters in POST request in function.
CVE-2016-3988 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/ C:L/I:L/A:L).




PRIVILEGE ESCALATION

Weak access controls allow for privilege escalation from "nobody" to "root" user. "nobody" has permissions to alter script that can only run as "root."
CVE-2016-3989 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).





### VULNERABILITY DETAILS


# EXPLOITABILITY

These vulnerabilities could be exploited remotely.


# EXISTENCE OF EXPLOIT

No known public exploits specifically target these vulnerabilities.


# DIFFICULTY

An attacker with a low skill would be able to exploit these vulnerabilities.





### MITIGATION

Meinberg has produced a new firmware Version 6.20.004. 

The new firmware can be downloaded by using the link below:
https://urldefense.proofpoint.com/v2/url?u=http-3A__www.meinberg.de_download_firmware_lantime_v6_firmware-2D6.20.004-2Dx86.rel&d=BQIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=zE5lG3CZZIbdBvT6slVAzQ&m=n4ZBSsrF-RphS7eiqohm3WcJ2BYQUCwQUHwVPHNFa6o&s=WlQnlBzw05tnJ1o29nmeXtGBbNubzjyRPqaWAdpXn5Y&e=