Vulnerability in tcpreplay package - tcprewrite program does not check frame size
Summary
DLA-544-1: tcpreplay - security update. Affects tcpreplay versions < 3.4.3-2+wheezy2. Fixed in 3.4.3-2+wheezy2. How to fix ↓
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Background
The tcpreplay package is a suite of tools used for replaying network traffic saved in pcap files. It includes the tcprewrite program, which is responsible for rewriting packet data. The vulnerability lies in the tcprewrite program's failure to validate the size of frames it processes. This issue becomes critical when processing huge frames, which can trigger a segmentation fault. Such frames are commonly encountered when capturing packets on interfaces with an MTU of or close to 65536, such as the loopback interface 'lo' in the Linux kernel.
Vulnerability Detail
The vulnerability in the tcprewrite program allows for a segmentation fault to occur when processing large frames. This can be exploited by an attacker to crash the program or potentially execute arbitrary code. The issue arises due to the lack of size validation in the frame processing logic. If an interface with a large MTU is used, the program may encounter frames that exceed its processing capabilities, leading to a crash.
How To Fix
Minimum fixed version
3.4.3-2+wheezy2
This is the first release that contains the fix.
sudo apt-get install --only-upgrade tcpreplayTip — 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. Upgrading to the fixed version is the only recommended solution.
Conclusion
The vulnerability in the tcpreplay package's tcprewrite program can lead to a segmentation fault when processing large frames. Upgrading to the fixed version is the recommended solution. For further support on vulnerability remediation, contact DevNack.com.
See every vulnerability recorded for tcpreplay →
FAQ
The vulnerability can lead to a segmentation fault in the tcprewrite program, potentially crashing the program or allowing for arbitrary code execution.
The vulnerability affects tcpreplay package version 0 and is fixed in version 3.4.3-2+wheezy2 or later.
No, this vulnerability requires the attacker to have access to the system and the ability to provide specially crafted network traffic.
There are no known instances of this vulnerability being exploited in the wild.
For more information about this vulnerability, refer to the Debian LTS security advisory DLA-544-1.
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