Critical Buffer Overflow Vulnerability in tcpdump: CVE-2016-7973
Summary
ALPINE-CVE-2016-7973: The AppleTalk parser in tcpdump before 4.9.0 has a buffer overflow in print-atalk.c, multiple functions. 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 diagnostics, security analysis, and troubleshooting. However, tcpdump has been found to have a critical vulnerability that affects its AppleTalk parser, which can lead to severe security risks if exploited.
Vulnerability Detail
The vulnerability, identified as CVE-2016-7973, originates from a buffer overflow in the AppleTalk parser within tcpdump versions prior to 4.9.0. This flaw allows an attacker to craft malicious packets that, when processed by tcpdump, can lead to arbitrary code execution, potentially compromising the system's integrity. The CVSS score for this vulnerability is 9.8, indicating a critical severity level, which means that successful exploitation could allow attackers to gain unauthorized access to sensitive data or execute harmful commands.
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 patching is not feasible, consider disabling the AppleTalk protocol in your network configuration or using alternative packet analysis tools that do not exhibit this vulnerability until an update can be applied.
Conclusion
In summary, CVE-2016-7973 is a critical buffer overflow vulnerability in tcpdump that poses significant security risks. Users are strongly advised to update to the latest version to mitigate these risks. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2016-7973 is a critical buffer overflow vulnerability found in tcpdump's AppleTalk parser that can lead to arbitrary code execution.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The CVSS score for this vulnerability is 9.8, indicating a critical severity level.
You can update tcpdump to the patched version by running 'apk add tcpdump@4.9.0-r0' in your terminal.
Failing to address this vulnerability could allow attackers to execute arbitrary code, potentially compromising sensitive data and system integrity.
References
Related vulnerabilities
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