CVE-2017-11147 : Vulnerability Insights and Analysis

A vulnerability in PHP versions before 5.6.30 and 7.x before 7.0.15 could allow attackers to crash the PHP interpreter or expose sensitive information by providing malicious archive files.

Understanding CVE-2017-11147

This CVE involves a buffer over-read in the phar_parse_pharfile function within the ext/phar directory of PHP.

What is CVE-2017-11147?

This CVE pertains to a vulnerability in PHP versions prior to 5.6.30 and 7.x before 7.0.15, allowing attackers to exploit the PHAR archive handler with malicious files.

The Impact of CVE-2017-11147

Attackers can crash the PHP interpreter or potentially disclose sensitive information.

Technical Details of CVE-2017-11147

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from a buffer over-read in the phar_parse_pharfile function in the phar.c file within the ext/phar directory.

Affected Systems and Versions

PHP versions before 5.6.30 and 7.x before 7.0.15 are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing malicious archive files to the PHP interpreter.

Mitigation and Prevention

Protecting systems from CVE-2017-11147 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update PHP to versions 5.6.30 or 7.0.15 or newer to mitigate the vulnerability.
Monitor for any unusual activities on PHP systems.

Long-Term Security Practices

Regularly update PHP and other software to the latest versions.
Implement file upload restrictions and security measures to prevent malicious file uploads.

Patching and Updates

Apply patches provided by PHP to address the buffer over-read vulnerability.