CVE-2018-20374 : Exploit Details and Defense Strategies

A vulnerability has been found in version 0.9.27 of Tiny C Compiler (TinyCC or TCC) that can lead to an 8-byte out-of-bounds write.

Understanding CVE-2018-20374

This CVE identifies a specific vulnerability in Tiny C Compiler version 0.9.27.

What is CVE-2018-20374?

CVE-2018-20374 is a security flaw in Tiny C Compiler that allows for an out-of-bounds write when compiling a specially crafted source file.

The Impact of CVE-2018-20374

The vulnerability poses a risk of an 8-byte out-of-bounds write in the use_section1 function located in tccasm.c.

Technical Details of CVE-2018-20374

This section provides more technical insights into the CVE.

Vulnerability Description

The issue arises during the compilation of a manipulated source file, resulting in the out-of-bounds write in the use_section1 function in tccasm.c.

Affected Systems and Versions

Product: Tiny C Compiler (TinyCC or TCC)
Version: 0.9.27

Exploitation Mechanism

The vulnerability can be exploited by compiling a specially crafted source file using the affected version of Tiny C Compiler.

Mitigation and Prevention

Protecting systems from CVE-2018-20374 requires immediate actions and long-term security measures.

Immediate Steps to Take

Avoid compiling untrusted or manipulated source files.
Monitor vendor updates and patches for Tiny C Compiler.

Long-Term Security Practices

Implement secure coding practices to prevent buffer overflows.
Regularly update and patch software to address known vulnerabilities.

Patching and Updates

Ensure that the Tiny C Compiler is updated to a patched version that addresses the out-of-bounds write vulnerability.