Moderate: rsync security and enhancement update
Summary
ALSA-2022:7793: Moderate: rsync security and enhancement update. Affects rsync versions < 3.1.3-19.el8. Fixed in 3.1.3-19.el8. How to fix ↓
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Background
The rsync utility is a powerful tool used for file copying and synchronization. It allows users to efficiently transfer files locally or across a network by only sending the differences between files instead of the entire file. Additionally, rsync is commonly used for mirroring purposes. It is widely used due to its speed and efficiency in transferring files.
Vulnerability Detail
The vulnerability identified in rsync is related to a heap-based buffer over-read and overflow in the zlib library's inflate() function. This vulnerability can be exploited by an attacker by providing a large gzip header extra field, leading to a heap-based buffer over-read and overflow. The impact of this vulnerability can vary depending on the context in which rsync is used. However, it has the potential to result in denial of service or possibly remote code execution.
How To Fix
Minimum fixed version
3.1.3-19.el8
This is the first release that contains the fix.
sudo dnf update rsyncTip — 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, users can mitigate the risk by ensuring that rsync is not exposed to untrusted networks or by implementing network-level protections such as firewalls and access controls.
Conclusion
In conclusion, the rsync utility has been found to have a moderate security vulnerability related to a heap-based buffer over-read and overflow in the zlib library. To mitigate this vulnerability, it is recommended to update the rsync package to the latest version. Users can find more information about this vulnerability in the provided CVE page(s). For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for rsync →
FAQ
Rsync is a utility used for file copying and synchronization. It is known for its efficiency in transferring files by only sending the differences between files instead of the entire file.
The impact of this vulnerability can vary depending on the context in which rsync is used. However, it has the potential to result in denial of service or possibly remote code execution.
To fix this vulnerability, it is recommended to update the rsync package to version 3.1.3-19.el8 or later. This update includes the necessary security patches to address the zlib vulnerability.
There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by ensuring that rsync is not exposed to untrusted networks or by implementing network-level protections such as firewalls and access controls.
More information about this vulnerability can be found in the CVE page(s) listed in the References section of the original vulnerability report.
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