CVE-2019-9025 : What You Need to Know
Discover the impact of CVE-2019-9025, a vulnerability in PHP 7.3.x before 7.3.1 that could lead to unauthorized access to data buffers. Learn about affected systems, exploitation, and mitigation steps.
A vulnerability has been found in PHP 7.3.x prior to version 7.3.1 that could lead to a negative argument being passed to the memcpy() function, potentially resulting in reading from and writing beyond allocated data buffers.
Understanding CVE-2019-9025
This CVE involves a vulnerability in PHP 7.3.x that could be exploited through the mb_split() function.
What is CVE-2019-9025?
This CVE refers to an issue in PHP 7.3.x before version 7.3.1 where supplying an invalid multibyte string to the mb_split() function can trigger the execution of memcpy() with a negative argument, allowing unauthorized access to data buffers.
The Impact of CVE-2019-9025
The vulnerability could potentially lead to unauthorized access to sensitive data, compromising the integrity and confidentiality of the affected systems.
Technical Details of CVE-2019-9025
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
An invalid multibyte string provided as input to the mb_split() function in PHP 7.3.x can cause the execution of memcpy() with a negative argument, leading to potential data buffer overflows.
Affected Systems and Versions
- Affected Version: PHP 7.3.x
- Prior to Version: 7.3.1
Exploitation Mechanism
The vulnerability can be exploited by providing a specially crafted invalid multibyte string as input to the mb_split() function, triggering the issue.
Mitigation and Prevention
Protecting systems from CVE-2019-9025 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update PHP to version 7.3.1 or later to mitigate the vulnerability.
- Monitor for any unauthorized access or unusual activities on the system.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement secure coding practices to prevent similar issues in the future.
Patching and Updates
Ensure timely application of security patches and updates to PHP and related components to prevent exploitation of this vulnerability.