Critical Buffer Overflow Vulnerability in mini_httpd: Remote Code Execution Risk
Summary
ALPINE-CVE-2017-17663: The htpasswd implementation of mini_httpd before v1.28 and of thttpd before v2.28 is affected by a buffer overflow that can be exploited remotely to perform code execution. Affects mini_httpd versions < 1.29-r0. Fixed in 1.29-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 low-resource environments. It provides essential web server functionalities, including support for CGI scripts and basic authentication. However, versions prior to 1.29 are vulnerable to a critical buffer overflow issue that can be exploited remotely, leading to potential code execution.
Vulnerability Detail
The vulnerability, identified as CVE-2017-17663, originates from the htpasswd implementation in mini_httpd versions before 1.28. This flaw allows an attacker to exploit a buffer overflow remotely, which can result in unauthorized code execution on the server. The severity of this vulnerability is underscored by its CVSS score of 9.8, indicating a high risk to affected systems.
How To Fix
Minimum fixed version
1.29-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, users can disable the htpasswd functionality or restrict access to the affected server until the package is updated. This can be achieved by modifying the server configuration to limit access to trusted IP addresses only.
Conclusion
The buffer overflow vulnerability in mini_httpd poses a significant risk to users of the affected versions. It is crucial to update to version 1.29-r0 or later to mitigate the risk of remote code execution. Users are encouraged to monitor their systems and utilize tools like Vulert for real-time vulnerability alerts.
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FAQ
CVE-2017-17663 is a critical vulnerability in mini_httpd that allows remote code execution due to a buffer overflow in the htpasswd implementation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Failure to address this vulnerability could lead to unauthorized access and control over the affected server, potentially compromising sensitive data.
Yes, you can temporarily disable the htpasswd functionality or restrict server access to trusted IP addresses until the patch is applied.
The CVSS score for this vulnerability is 9.8, indicating a critical level of risk.
References
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