In PHP versions 8.1.* before 8.1.31, 8.2.* before 8.2.26, and 8.3.* before 8.3.14, an uncontrolled long string input to the ldap_escape() function on 32-bit systems can cause an integer overflow, resulting in an out-of-bounds write. This vulnerability allows attackers to exploit the affected systems, leading to significant risks.
The severity level of this vulnerability is critical, with a CVSS score of 9.8, indicating that it poses a substantial risk to organizations using vulnerable PHP versions. The exploitation status remains unconfirmed, but the potential for exploitation exists.
Organizations should prioritize patching immediately. Failure to address this vulnerability can lead to unauthorized access and compromise of sensitive data.
Given the critical nature of the vulnerability, it's essential for security teams to assess their current PHP deployments and take necessary actions to mitigate risks.
Vulnerability Details
In PHP versions 8.1.* before 8.1.31, 8.2.* before 8.2.26, and 8.3.* before 8.3.14, the vulnerability arises from the inability to properly handle long string inputs in the ldap_escape() function. This can lead to an integer overflow, resulting in an out-of-bounds write, which can be exploited by attackers.
The CVSS score of 9.8 indicates that the vulnerability has a high potential for impact, with confidentiality, integrity, and availability all being rated as high. The vulnerability has been classified under CWEs 787 (Out-of-bounds Write) and 190 (Integer Overflow or Wraparound).
Technical Analysis
The root cause of this vulnerability lies in the handling of string inputs by the ldap_escape() function. On 32-bit systems, uncontrolled long string inputs can lead to integer overflow, which allows attackers to write data outside the intended memory bounds.
The attack vector is network-based, meaning attackers can exploit this vulnerability remotely. The attack complexity is low, requiring no special privileges or user interaction, which further increases the risk associated with this vulnerability.
This vulnerability impacts the confidentiality, integrity, and availability of the affected systems, allowing attackers to potentially execute arbitrary code or perform unauthorized actions.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to sensitive data, system compromise, and potential data loss. The vulnerability's ability to allow out-of-bounds writes can lead to severe impacts, including application crashes and exploitation of the underlying server.
Given the critical severity score, organizations should assess their exposure and implement mitigation strategies immediately. The urgency for patching cannot be overstated as the potential impact is significant.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of PHP include 8.1.* before 8.1.31, 8.2.* before 8.2.26, and 8.3.* before 8.3.14. Organizations running these versions should prioritize patching.
Mitigation & Remediation
Organizations should upgrade to the latest PHP versions immediately to mitigate this vulnerability. The latest versions contain patches that address this issue. If upgrading is not possible, implement input validation to restrict long string inputs to the ldap_escape() function.
For more comprehensive security, consider conducting a penetration test to identify any weaknesses that may arise from this vulnerability.
Detection Guidance
Monitor logs for unusual input patterns, particularly in functions that handle user data such as ldap_escape(). Look for anomalies in application behavior that might indicate exploitation attempts.
AppSecure Threat Intelligence Insight
This vulnerability exemplifies the need for continuous vulnerability assessment in development environments. Security teams must remain vigilant and proactive in their security measures.
For further insights into vulnerability management, review our vulnerability management program design. Additionally, understanding the implications of this vulnerability can be enhanced by exploring our guide on penetration testing methodologies for effective remediation.
This vulnerability also serves as a reminder of the importance of coding standards that prevent such security flaws from occurring. Organizations must embed security into their development lifecycle.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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