CVE-2017-7295 : What You Need to Know
Discover the impact of CVE-2017-7295 on Contiki OS 3.0. Learn about the use-after-free vulnerability in cc26xx-web-demo httpd, leading to a denial of service attack. Find mitigation steps and prevention measures.
Contiki Operating System 3.0 has a vulnerability in cc26xx-web-demo httpd's httpd-simple.c, leading to a denial of service attack.
Understanding CVE-2017-7295
What is CVE-2017-7295?
An issue in Contiki OS 3.0 allows a use-after-free vulnerability in cc26xx-web-demo httpd. Improper deallocation of http_state structure causes a NULL pointer dereference, resulting in a board crash and potential denial of service.
The Impact of CVE-2017-7295
The vulnerability enables attackers to crash the board, leading to a denial of service attack.
Technical Details of CVE-2017-7295
Vulnerability Description
- Use-after-free vulnerability in cc26xx-web-demo httpd's httpd-simple.c
- Improper deallocation of http_state structure
- NULL pointer dereference in the output processing function
- Allows for a denial of service attack
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Version: Not applicable
Exploitation Mechanism
- Upon a connection close event, the http_state structure is not deallocated correctly
- Results in a NULL pointer dereference in the output processing function
- Leads to a board crash and denial of service
Mitigation and Prevention
Immediate Steps to Take
- Apply vendor patches or updates if available
- Monitor network traffic for any suspicious activity
Long-Term Security Practices
- Regularly update and patch software and firmware
- Implement network segmentation and access controls
Patching and Updates
- Check for patches or updates from Contiki OS or the relevant vendor