Vulnerability in tcpdump - Buffer Overflow in Parser
Summary
DLA-809-1: tcpdump - security update. Affects tcpdump versions < 4.9.0-1~deb7u1. Fixed in 4.9.0-1~deb7u1. How to fix ↓
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Background
tcpdump is a command-line network traffic analyzer that allows users to capture and analyze packets transmitted over a network. It is widely used for network troubleshooting, protocol development, and education. However, multiple vulnerabilities have been discovered in tcpdump, specifically in its parser, which could lead to denial of service or the execution of arbitrary code.
Vulnerability Detail
The identified vulnerability in tcpdump is a buffer overflow in the parser. This vulnerability allows an attacker to send specially crafted network packets that can overflow the buffer in the parser, potentially leading to a crash or the execution of arbitrary code. The buffer overflow occurs due to insufficient input validation and can be exploited remotely. Attackers can exploit this vulnerability to gain unauthorized access, compromise the integrity of the system, or cause a denial of service.
How To Fix
Minimum fixed version
4.9.0-1~deb7u1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade tcpdumpTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the recommended fix by upgrading the tcpdump package to the patched version.
Conclusion
The identified vulnerability in tcpdump poses a significant risk to systems using the affected versions. It is crucial to apply the recommended fix by upgrading the tcpdump package to the patched version to mitigate the risk of exploitation. For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for tcpdump →
FAQ
tcpdump is a command-line network traffic analyzer that captures and analyzes packets transmitted over a network.
A buffer overflow is a vulnerability that occurs when a program writes data beyond the allocated buffer, potentially overwriting adjacent memory and causing unexpected behavior or crashes.
This vulnerability can be exploited by sending specially crafted network packets to the vulnerable tcpdump parser, causing a buffer overflow and potentially allowing an attacker to execute arbitrary code or crash the system.
No, there is no known workaround for this vulnerability. It is crucial to apply the recommended fix by upgrading the tcpdump package to the patched version.
To upgrade the tcpdump package, you can use the package manager of your operating system. For Debian 7 Wheezy, the fix is available in version 4.9.0-1~deb7u1 of the tcpdump package.
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