CVE-2022-1587 : Vulnerability Insights and Analysis

An out-of-bounds read vulnerability was discovered in the PCRE2 library, affecting recursions in JIT-compiled regular expressions caused by duplicate data transfers.

Understanding CVE-2022-1587

This vulnerability, assigned CVE-2022-1587, impacts the PCRE2 library due to an out-of-bounds read issue in the get_recurse_data_length() function of the pcre2_jit_compile.c file.

What is CVE-2022-1587?

The CVE-2022-1587 vulnerability in PCRE2 involves recursive operations in Just-In-Time (JIT) compiled regular expressions, triggered by redundant data transfers.

The Impact of CVE-2022-1587

This vulnerability could allow an attacker to exploit the PCRE2 library through specially crafted input, leading to potential information disclosure or denial of service.

Technical Details of CVE-2022-1587

Vulnerability Description

The vulnerability exists in the get_recurse_data_length() function of the pcre2_jit_compile.c file, causing out-of-bounds reads during recursive operations in regular expressions.

Affected Systems and Versions

The affected product is PCRE2 with versions before pcre2-10.40. Users with prior versions are vulnerable to this issue.

Exploitation Mechanism

Attackers can exploit this vulnerability by supplying malicious input that triggers recursive operations, leading to out-of-bounds reads within the PCRE2 library.

Mitigation and Prevention

Immediate Steps to Take

To mitigate the CVE-2022-1587 vulnerability, users are advised to update the PCRE2 library to version pcre2-10.40 or later. It is crucial to apply security patches promptly.

Long-Term Security Practices

Maintaining up-to-date software versions, implementing input validation, and following secure coding practices can enhance overall system security and help prevent similar vulnerabilities.

Patching and Updates

Regularly monitor vendor advisories for security updates and apply patches as soon as they are available to safeguard systems against exploits.