Arbitrary Command Execution in Lsyncd
Summary
CVE-2014-8990: default-rsyncssh.lua in Lsyncd 2.1.5 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in a filename. Affects lsyncd versions < 2.1.5-2. Fixed in 2.1.5-2. How to fix ↓
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Background
Lsyncd is an open-source tool used for live data synchronization and mirroring. It monitors specified directories for changes and synchronizes them to a remote target. Lsyncd uses rsync and ssh for data transfer and remote execution. However, versions 2.1.5 and earlier of Lsyncd are vulnerable to arbitrary command execution.
Vulnerability Detail
The vulnerability, identified as CVE-2014-8990, allows remote attackers to execute arbitrary commands by exploiting shell metacharacters in a filename. This means that an attacker can manipulate a filename to include malicious commands, which will be executed when Lsyncd processes the file.
How To Fix
Minimum fixed version
2.1.5-2
This is the first release that contains the fix.
sudo apt-get install --only-upgrade lsyncdTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. However, as a general security practice, it is advisable to ensure that Lsyncd is running with the least privileges necessary and that it is not exposed to untrusted networks or users.
Conclusion
The arbitrary command execution vulnerability in Lsyncd versions 2.1.5 and earlier can allow remote attackers to execute arbitrary commands on the affected system. To mitigate this vulnerability, it is crucial to upgrade Lsyncd to version 2.1.5-2 or later. For further assistance or support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for lsyncd →
FAQ
The vulnerability allows remote attackers to execute arbitrary commands on the affected system. This can lead to unauthorized access, data manipulation, and potential compromise of the entire system.
No, only versions 2.1.5 and earlier are vulnerable to this arbitrary command execution issue. It is recommended to upgrade to version 2.1.5-2 or later to mitigate the vulnerability.
No, authentication is not required. Remote attackers can exploit this vulnerability without any authentication, as long as they can send malicious files to the target system.
Yes, this vulnerability can be exploited remotely. Attackers can send specially crafted files to the target system, triggering the execution of arbitrary commands.
There is no specific evidence of active exploits targeting this vulnerability in the wild. However, it is always recommended to apply security patches and updates promptly to mitigate potential risks.
References
Related vulnerabilities
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