Heap-Based Buffer Overflow in MCPP Package: CVE-2019-14274
Summary
ALPINE-CVE-2019-14274: MCPP 2.7.2 has a heap-based buffer overflow in the do_msg() function in support.c. Affects mcpp versions < 2.7.2-r2. Fixed in 2.7.2-r2. How to fix ↓
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Background
MCPP (M C Preprocessor) is a widely used C preprocessor that facilitates the management of macros and file inclusions in C programming. It is designed to enhance the efficiency of C code compilation by allowing developers to define macros and include files dynamically. However, MCPP versions prior to 2.7.2-r2 are vulnerable to a critical security flaw that can lead to severe consequences if exploited.
Vulnerability Detail
The vulnerability identified as CVE-2019-14274 is a heap-based buffer overflow in the do_msg() function located in support.c of MCPP version 2.7.2. This flaw allows an attacker to manipulate memory allocation, potentially leading to arbitrary code execution or application crashes. The vulnerability arises from improper handling of input data, which can overflow the allocated memory buffer, compromising the integrity of the application and the system it runs on.
How To Fix
Minimum fixed version
2.7.2-r2
This is the first release that contains the fix.
sudo apk add --upgrade mcppTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate patching is not feasible, consider restricting access to the application or implementing input validation to prevent malicious data from being processed. However, these are temporary measures and should not replace the need for a proper update.
Conclusion
CVE-2019-14274 represents a significant security risk for applications using the MCPP package. It is crucial to update to the patched version 2.7.2-r2 to protect against potential exploits. Regular monitoring and vulnerability management practices, such as using tools like Vulert, can help maintain the security of your software.
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FAQ
CVE-2019-14274 is a security vulnerability in the MCPP package that allows for a heap-based buffer overflow, potentially leading to arbitrary code execution.
MCPP versions prior to 2.7.2-r2 are affected by this vulnerability.
You can use the Vulert playground at Vulert Scanner to check if your application is impacted by this vulnerability without requiring any signup.
The CVSS score for CVE-2019-14274 is 5.5, indicating a moderate level of severity.
If you cannot update the package, consider implementing input validation and restricting access to the application as temporary workarounds.
References
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