CVE-2017-1000112 : Vulnerability Insights and Analysis
Learn about CVE-2017-1000112, a critical vulnerability in the Linux kernel leading to memory corruption due to UFO to non-UFO path switch. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability in the Linux kernel related to the transition from UFO to non-UFO paths, resulting in memory corruption.
Understanding CVE-2017-1000112
This CVE involves a critical vulnerability in the Linux kernel that can lead to memory corruption due to a switch from UFO to non-UFO paths.
What is CVE-2017-1000112?
The vulnerability occurs during the construction of a UFO packet with MSG_MORE, where the function __ip_append_data() is called to append data using ip_ufo_append_data(). However, if the path changes from UFO to non-UFO while sending the packet, it can cause memory corruption.
The Impact of CVE-2017-1000112
The vulnerability can result in memory corruption when the length of the UFO packet exceeds the maximum transmission unit (MTU), leading to out-of-bounds data writes and potential exploitation.
Technical Details of CVE-2017-1000112
This section provides more in-depth technical details about the vulnerability.
Vulnerability Description
The bug allows for memory corruption due to a switch from UFO to non-UFO paths during packet transmission, leading to out-of-bounds data writes.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Affected Version: Not applicable
Exploitation Mechanism
- Constructing a UFO packet with MSG_MORE triggers the vulnerability
- Path switch from UFO to non-UFO during packet transmission
- Negative value computation leading to memory corruption
Mitigation and Prevention
Protecting systems from CVE-2017-1000112 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply relevant patches from the vendor
- Monitor security advisories for updates
- Implement network segmentation to limit exposure
Long-Term Security Practices
- Regularly update and patch the Linux kernel
- Conduct security assessments and audits
- Employ intrusion detection and prevention systems
Patching and Updates
- Check for patches and updates from Linux kernel maintainers
- Apply security updates promptly to mitigate the vulnerability