Critical Buffer Overflow Vulnerability in tcpdump: CVE-2016-7928
Summary
ALPINE-CVE-2016-7928: The IPComp parser in tcpdump before 4.9.0 has a buffer overflow in print-ipcomp.c:ipcomp_print(). Affects tcpdump versions < 4.9.0-r0. Fixed in 4.9.0-r0. How to fix ↓
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Background
tcpdump is a widely used command-line packet analyzer tool that allows users to capture and display network packets transmitted or received over a network. It is essential for network troubleshooting, analysis, and security auditing. The tool is known for its ability to dissect various network protocols and provide detailed information about network traffic. However, tcpdump versions prior to 4.9.0 are vulnerable to a critical buffer overflow issue in the IPComp parser, which can lead to severe security risks.
Vulnerability Detail
The vulnerability identified as CVE-2016-7928 originates from a buffer overflow in the IPComp parser within tcpdump, specifically in the function print-ipcomp.c:ipcomp_print(). This flaw allows an attacker to exploit the vulnerability by crafting malicious packets that, when processed by tcpdump, can lead to arbitrary code execution or cause the application to crash. The severity of this vulnerability is underscored by its CVSS score of 9.8, indicating a critical risk to systems using affected versions of tcpdump.
How To Fix
Minimum fixed version
4.9.0-r0
This is the first release that contains the fix.
sudo apk add --upgrade tcpdumpTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, consider restricting access to the tcpdump tool or running it in a controlled environment where exposure to untrusted network traffic is minimized. Additionally, monitor network traffic closely for any unusual activity.
Conclusion
In summary, CVE-2016-7928 represents a critical buffer overflow vulnerability in tcpdump that can lead to severe security implications. It is crucial for users to update to the patched version 4.9.0 or later to mitigate risks. Additionally, utilizing tools like Vulert can help monitor for such vulnerabilities in real-time.
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FAQ
CVE-2016-7928 is a critical buffer overflow vulnerability found in tcpdump versions prior to 4.9.0, which can lead to arbitrary code execution.
You can check your version of tcpdump by running 'tcpdump -V' in your terminal. If it is below 4.9.0, it is vulnerable.
Exploiting this vulnerability can allow attackers to execute arbitrary code on the affected system, potentially leading to unauthorized access or system crashes.
Yes, you can use tools like Vulert, which monitors and alerts for open-source vulnerabilities in your software using just a manifest file.
Detailed information about CVE-2016-7928 can be found on vulnerability databases and security advisories, including the official CVE website.
References
Related vulnerabilities
Recent vulnerabilities recorded for tcpdump.
