CVE-2017-12894 : Exploit Details and Defense Strategies
Learn about CVE-2017-12894, a vulnerability in tcpdump before version 4.9.2 that could lead to a buffer over-read. Find out how to mitigate and prevent exploitation of this security issue.
Before version 4.9.2 of tcpdump, there were multiple protocol parsers that had the potential to result in a buffer over-read in the lookup_bytestring() function of addrtoname.c.
Understanding CVE-2017-12894
Several protocol parsers in tcpdump before 4.9.2 could cause a buffer over-read in addrtoname.c:lookup_bytestring().
What is CVE-2017-12894?
CVE-2017-12894 is a vulnerability in tcpdump that could lead to a buffer over-read in the lookup_bytestring() function of addrtoname.c before version 4.9.2.
The Impact of CVE-2017-12894
This vulnerability could potentially be exploited by attackers to read beyond the allocated memory, leading to information disclosure or a denial of service.
Technical Details of CVE-2017-12894
Vulnerability Description
The vulnerability in tcpdump before version 4.9.2 could result in a buffer over-read in the lookup_bytestring() function of addrtoname.c.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The vulnerability could be exploited by malicious actors to trigger a buffer over-read, potentially leading to information disclosure or denial of service.
Mitigation and Prevention
Immediate Steps to Take
- Update tcpdump to version 4.9.2 or later to mitigate the vulnerability.
- Monitor vendor advisories for patches and security updates.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Conduct security assessments and audits to identify and address vulnerabilities.
Patching and Updates
Ensure that all systems running tcpdump are updated to version 4.9.2 or above to prevent exploitation of this vulnerability.