Critical File Read Vulnerability in mini_httpd - CVE-2018-18778
Summary
ALPINE-CVE-2018-18778: ACME mini_httpd before 1.30 lets remote users read arbitrary files. Affects mini_httpd versions < 1.30-r0. Fixed in 1.30-r0. How to fix ↓
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Background
mini_httpd is a lightweight HTTP server designed for simplicity and efficiency, often used in embedded systems and small web applications. It provides basic web serving capabilities and is known for its minimal resource footprint. However, a vulnerability identified as CVE-2018-18778 allows remote users to read arbitrary files, posing a significant security risk.
Vulnerability Detail
The vulnerability arises from improper access controls in mini_httpd versions prior to 1.30. This flaw allows unauthorized remote users to exploit the server and read sensitive files on the host system. The potential ramifications include exposure of confidential information, which could lead to further attacks or data breaches. The vulnerability has a CVSS score of 6.5, indicating a medium severity level.
How To Fix
Minimum fixed version
1.30-r0
This is the first release that contains the fix.
sudo apk add --upgrade mini_httpdTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, you can restrict access to sensitive files by configuring the server to deny access to specific directories or files. This can be done by modifying the server's configuration file to include rules that prevent unauthorized access.
Conclusion
The CVE-2018-18778 vulnerability in mini_httpd poses a significant risk by allowing unauthorized file access. It is crucial to update to version 1.30-r0 or later to mitigate this risk. For those unable to update immediately, implementing access restrictions can serve as a temporary measure.
See every vulnerability recorded for mini_httpd →
FAQ
CVE-2018-18778 is a vulnerability in mini_httpd that allows remote users to read arbitrary files on the server.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The risks include unauthorized access to sensitive files, which could lead to data breaches and further exploitation of the server.
Yes, the patched version of mini_httpd is 1.30-r0, which addresses this vulnerability.
If an immediate update is not possible, consider implementing access restrictions in the server configuration as a temporary workaround.
References
Related vulnerabilities
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