CVE-2017-12986 Explained : Impact and Mitigation
Learn about CVE-2017-12986, a buffer over-read vulnerability in tcpdump versions before 4.9.2, allowing potential code execution or denial of service. Find mitigation steps and affected systems here.
CVE-2017-12986, a vulnerability in tcpdump versions prior to 4.9.2, involves a buffer over-read issue in the IPv6 routing header parser. This vulnerability can be exploited by an attacker to potentially execute arbitrary code or cause a denial of service.
Understanding CVE-2017-12986
CVE-2017-12986 is a security vulnerability in tcpdump that affects the handling of IPv6 routing headers, potentially leading to a buffer over-read.
What is CVE-2017-12986?
The buffer over-read issue is present in the IPv6 routing header parser of tcpdump versions prior to 4.9.2. It specifically occurs in the rt6_print() function of the print-rt6.c file.
The Impact of CVE-2017-12986
This vulnerability could allow an attacker to exploit the buffer over-read in the IPv6 routing header parser, leading to potential arbitrary code execution or denial of service.
Technical Details of CVE-2017-12986
CVE-2017-12986 involves a specific vulnerability in tcpdump versions prior to 4.9.2.
Vulnerability Description
The IPv6 routing header parser in tcpdump before 4.9.2 has a buffer over-read in print-rt6.c:rt6_print().
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Versions Affected: Versions of tcpdump prior to 4.9.2
Exploitation Mechanism
The vulnerability can be exploited by crafting a malicious IPv6 packet to trigger the buffer over-read in the rt6_print() function of the print-rt6.c file.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2017-12986.
Immediate Steps to Take
- Update tcpdump to version 4.9.2 or later to patch the vulnerability.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
Ensure that all systems running tcpdump are regularly updated with the latest security patches to prevent exploitation of this vulnerability.