Critical Use-After-Free Vulnerability in Lighttpd Package
Summary
DEBIAN-CVE-2018-25103: There exists use-after-free vulnerabilities in lighttpd. Affects lighttpd versions < 1.4.52-1. Fixed in 1.4.52-1. How to fix ↓
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Background
Lighttpd is a lightweight web server designed for high-performance environments. It is known for its speed and efficiency, making it a popular choice for serving dynamic content. However, certain versions of Lighttpd are vulnerable to a use-after-free issue that can lead to security risks, particularly in request parsing.
Vulnerability Detail
The vulnerability identified as DEBIAN-CVE-2018-25103 affects Lighttpd versions up to 1.4.50. It arises from improper handling of memory during request parsing, which may allow an attacker to read from invalid pointers. This could potentially lead to unauthorized access to sensitive data or application crashes, impacting the overall security and stability of the web server.
How To Fix
Minimum fixed version
1.4.52-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade lighttpdTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, consider disabling features that rely on request parsing until the package is updated. However, this may limit functionality and is not a long-term solution.
Conclusion
The use-after-free vulnerability in Lighttpd poses significant risks to users of affected versions. It is crucial to update to the patched version 1.4.52-1 or later to mitigate these risks. Additionally, utilizing tools like Vulert can help monitor and manage vulnerabilities in your software effectively.
See every vulnerability recorded for lighttpd →
FAQ
A use-after-free vulnerability occurs when a program continues to use a pointer after the memory it points to has been freed, potentially leading to unpredictable behavior or security issues.
You can check your version of Lighttpd by running 'lighttpd -v' in your terminal. If your version is 1.4.50 or earlier, it is affected by this vulnerability.
Not addressing this vulnerability could expose your server to attacks that exploit the use-after-free condition, potentially leading to data breaches or service disruptions.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
References
Related vulnerabilities
Recent vulnerabilities recorded for lighttpd.
