CVE-2017-11362 : Vulnerability Insights and Analysis

PHP versions 7.x before 7.0.21 and 7.1.x before 7.1.7 are vulnerable to a stack-based buffer overflow due to unrestricted locale length in ext/intl/msgformat/msgformat_parse.c.

Understanding CVE-2017-11362

This CVE highlights a vulnerability in PHP versions that could lead to denial of service or other unspecified impacts.

What is CVE-2017-11362?

The vulnerability in PHP versions 7.x before 7.0.21 and 7.1.x before 7.1.7 allows remote attackers to exploit a stack-based buffer overflow by providing a long first argument to the msgfmt_parse_message function.

The Impact of CVE-2017-11362

Remote attackers can potentially cause a denial of service or other unspecified impacts in International Components for Unicode (ICU) for C/C++.

Technical Details of CVE-2017-11362

PHP versions 7.x before 7.0.21 and 7.1.x before 7.1.7 are affected by this vulnerability.

Vulnerability Description

The issue arises from the lack of locale length restriction in ext/intl/msgformat/msgformat_parse.c, enabling a stack-based buffer overflow.

Affected Systems and Versions

PHP versions 7.x before 7.0.21 and 7.1.x before 7.1.7

Exploitation Mechanism

Attackers exploit the vulnerability by providing a long first argument to the msgfmt_parse_message function.

Mitigation and Prevention

To address CVE-2017-11362, consider the following steps:

Immediate Steps to Take

Update PHP to versions 7.0.21 or 7.1.7 to mitigate the vulnerability.
Monitor for any unusual activity that could indicate an exploit attempt.

Long-Term Security Practices

Regularly update PHP and other software to the latest versions to patch known vulnerabilities.
Implement network security measures to detect and prevent buffer overflow attacks.

Patching and Updates

Apply patches provided by PHP to fix the vulnerability and enhance system security.