CVE-2017-8399 : Exploit Details and Defense Strategies

PCRE2 before version 10.30 is susceptible to an out-of-bounds write due to a stack-based buffer overflow in pcre2_match.c. This vulnerability is triggered by a 'pattern with a large number of captures.'

Understanding CVE-2017-8399

PCRE2 is affected by a stack-based buffer overflow leading to an out-of-bounds write.

What is CVE-2017-8399?

The vulnerability in PCRE2 versions prior to 10.30 allows an attacker to trigger an out-of-bounds write through a stack-based buffer overflow.

The Impact of CVE-2017-8399

This vulnerability could be exploited by an attacker to execute arbitrary code or cause a denial of service (DoS) condition on the affected system.

Technical Details of CVE-2017-8399

PCRE2 version before 10.30 is affected by a stack-based buffer overflow.

Vulnerability Description

The issue arises from a stack-based buffer overflow in pcre2_match.c due to a 'pattern with a large number of captures.'

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions prior to 10.30

Exploitation Mechanism

The vulnerability can be exploited by crafting a malicious pattern with a large number of captures, triggering the out-of-bounds write.

Mitigation and Prevention

Immediate action is necessary to address the CVE-2017-8399 vulnerability.

Immediate Steps to Take

Update PCRE2 to version 10.30 or later to mitigate the vulnerability.
Monitor vendor security advisories for patches and updates.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Implement strong input validation to prevent buffer overflows.

Patching and Updates

Apply patches provided by the vendor promptly to fix the vulnerability.