NoMachine up to 6.4.5 on Windows 10 DokanFS nxfs.sys memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.3 | $0-$5k | 0.00 |
A vulnerability was found in NoMachine up to 6.4.5 on Windows 10 and classified as problematic. This issue affects some unknown functionality in the library nxfs.sys of the component DokanFS. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. The summary by CVE is:
The nxfs.sys driver in the DokanFS library 0.6.0 in NoMachine before 6.4.6 on Windows 10 allows local users to cause a denial of service (BSOD) because uninitialized memory can be read.
The bug was discovered 12/07/2018. The weakness was disclosed 12/10/2018 (Website). It is possible to read the advisory at nomachine.com. The identification of this vulnerability is CVE-2018-20029 since 12/10/2018. Attacking locally is a requirement. A simple authentication is required for exploitation. Technical details of the vulnerability are known, but there is no available exploit.
The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371373 (Nomachine nxfs.sys Driver Denial of Service Vulnerability (TR11P08975)).
Upgrading to version 6.4.6 eliminates this vulnerability.
Product
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.5VulDB Meta Temp Score: 5.4
VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.5
NVD Vector: 🔍
CVSSv2
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Memory corruptionCWE: CWE-119
ATT&CK: Unknown
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: NoMachine 6.4.6
Timeline
12/07/2018 🔍12/10/2018 🔍
12/10/2018 🔍
12/10/2018 🔍
12/11/2018 🔍
04/19/2020 🔍
Sources
Advisory: nomachine.comStatus: Not defined
CVE: CVE-2018-20029 (🔍)
Entry
Created: 12/11/2018 07:53Updated: 04/19/2020 16:09
Changes: 12/11/2018 07:53 (61), 04/19/2020 16:09 (1)
Complete: 🔍
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