CVE-2019-25547
Buffer Overflow in NetAware 1.20 User Blocking Causes Crash
Publication date: 2026-03-21
Last updated on: 2026-03-23
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| spytech-web | netaware | 1.20 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': "CVE-2019-25547 is a buffer overflow vulnerability in NetAware version 1.20, specifically in the User Blocking feature. It occurs when a local attacker supplies an oversized input buffer of 512 bytes into the 'Add a website or keyword to be filtered' field. This causes an out-of-bounds write that leads to the application crashing when the created block is removed."}] [1, 2]
How can this vulnerability impact me? :
This vulnerability can be exploited by local attackers to cause a denial of service (DoS) by crashing the NetAware application. The crash happens when the attacker pastes a malicious 512-byte buffer into the filtering input field and then removes the created block, leading to application instability and unavailability.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
[{'type': 'paragraph', 'content': "This vulnerability can be detected by reproducing the conditions that trigger the buffer overflow in NetAware 1.20. Specifically, you can test the 'Add a website or keyword to be filtered' input field in the User Blocking feature by supplying an oversized input buffer of 512 bytes."}, {'type': 'paragraph', 'content': 'A practical detection method involves using the provided proof-of-concept exploit steps:'}, {'type': 'list_item', 'content': "Run the Python script 'NetAware.py' to generate a file named 'NetAware.txt' containing 512 'A' characters."}, {'type': 'list_item', 'content': "Copy the contents of 'NetAware.txt' to the clipboard."}, {'type': 'list_item', 'content': "Open the NetAware application and navigate to 'Settings' > 'User Blocking'."}, {'type': 'list_item', 'content': "Click 'Add Block', paste the clipboard content into the input field, and confirm by clicking 'OK'."}, {'type': 'list_item', 'content': "Select the newly created block and click 'Remove' to trigger the crash, confirming the presence of the vulnerability."}] [1]
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': "Immediate mitigation steps include avoiding the use of the 'Add a website or keyword to be filtered' input field with inputs larger than expected, especially inputs of 512 bytes or more."}, {'type': 'paragraph', 'content': 'Restrict local access to the NetAware application to trusted users only, as the vulnerability requires local attacker interaction.'}, {'type': 'paragraph', 'content': 'Monitor for application crashes related to the User Blocking feature and consider disabling or limiting this feature until a patch or update is available.'}] [2]