Moderate Vulnerability in RRDtool: Stack Buffer Overflow in rrdcached
Summary
ALSA-2026:34155: Moderate: rrdtool security update. Affects python3-rrdtool versions < 1.7.0-17.el8_10. Fixed in 1.7.0-17.el8_10. How to fix ↓
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Background
RRDtool is a high-performance data logging and graphing utility that efficiently stores and displays time-series data, such as network bandwidth and server load averages. It is widely used for monitoring and visualizing data trends over time. The tool integrates seamlessly with various programming languages, including Perl, Python, Ruby, Lua, Tcl, and PHP, making it versatile for developers. However, a recent security issue has been identified that could lead to local privilege escalation.
Vulnerability Detail
The vulnerability arises from a stack buffer overflow in the handle_request_create() function of rrdcached, which processes unbounded Data Source (DS) and Round Robin Archive (RRA) arguments. This flaw allows an attacker with local access to escalate privileges, potentially compromising the system's security. The specific identifier for this vulnerability is CVE-2026-43958.
How To Fix
Minimum fixed version
1.7.0-17.el8_10
This is the first release that contains the fix.
sudo dnf update python3-rrdtoolTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users may restrict access to the rrdcached service to trusted users only, thereby minimizing the risk of exploitation until the package can be updated.
Conclusion
The identified vulnerability in RRDtool poses a moderate risk due to the potential for local privilege escalation. Users are strongly advised to update their installations to the latest patched versions to ensure their systems remain secure. Additionally, utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.
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FAQ
The vulnerability is a stack buffer overflow in the rrdcached service, which can lead to local privilege escalation.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
If exploited, this vulnerability could allow an attacker to gain elevated privileges on the system, potentially leading to unauthorized access and control.
Update the affected RRDtool packages to version 1.7.0-17.el8_10 or later as soon as possible to mitigate the risk.
Yes, Vulert provides a service that monitors and alerts for open-source vulnerabilities in your software using a manifest file like package-lock.json.
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