External risk intelligence

Windows Driver Vulnerability Allows for Privilege Escalation.

CVE advisoryKnown Exploit

CVE-2023-23376

A flaw in the Windows Common Log File System Driver allows local attackers to elevate privileges, potentially impacting system integrity and data confidentiality. This presents a risk to organizations due to the possibility of unauthorized system access or disruption.

1Halo Surface Signal

Out-of-bounds Write

Microsoft Windows 10 1507

before 10.0.10240.19747before 10.0.14393.5717before 10.0.17763.4010before 10.0.19042.2604before 10.0.19044.2604before 10.0.19045.2604before 10.0.22000.1574before 10.0.22621.1265r2;...

External exposure likelihood

Halo Surface Signal score for CVE-2023-23376

This vulnerability resides within the Windows Common Log File System (CLFS) driver, which is a local operating system component. Exploitation requires an attacker to already have local access to the system. It does not provide a network-accessible service or interface, and is therefore not exposed to the public internet.

Horizon Alert

Summary of the vulnerability and why it matters

The Windows Common Log File System Driver contains a flaw that permits an attacker with local access to gain elevated privileges. This vulnerability can allow unauthorized actions on affected systems. The potential impact includes unauthorized data access or modification, and the disruption of business operations.

  • Vulnerable: Windows Common Log File System Driver
  • Weakness: Elevation of privilege flaw
  • Impact: Unauthorized system access or disruption

Attack Path

How an attacker could exploit the issue

This vulnerability resides within a core component of the Windows operating system, the Common Log File System (CLFS) driver. Exploitation necessitates that an attacker already possesses local access to an affected system. The vulnerability does not present a network-accessible service or interface, meaning it is not directly exposed to the public internet.

  • Local access required for exposure.
  • Attacker exploits driver for control.
  • Local privilege escalation achieved.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability presents a significant risk to organizations, allowing an attacker with initial access to gain elevated privileges. Such access could enable attackers to compromise sensitive data, deploy additional malware, or disrupt business operations. The successful exploitation of this vulnerability could lead to widespread system compromise and significant business risk.

  • Likely attacker skill level: Low
  • Required access or conditions: Local system access
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in the Windows Common Log File System Driver could allow an attacker with local access to gain elevated privileges. This could impact system integrity and the confidentiality of data. The potential for privilege escalation presents a significant risk to the organization if not addressed.

  • Find systems running affected Windows versions.
  • Limit local access to critical systems.
  • Apply vendor updates; verify remediation.

Frequently asked questions

What is the Windows Common Log File System Driver?

The Windows Common Log File System (CLFS) driver is a fundamental operating system component. It enables various drivers and services to utilize a shared logging mechanism for recording events and data. This driver is integral to the functionality of many Windows features.

How does CVE-2023-23376 grant elevated privileges?

CVE-2023-23376 is an elevation of privilege vulnerability. It is linked to CWE-122, which typically involves memory allocation issues. By exploiting this flaw, an attacker with existing system access can escalate their privileges to gain greater control.

What is the weakness exploited in CVE-2023-23376?

The vulnerability CVE-2023-23376 is associated with CWE-122, indicating a potential heap-based buffer overflow weakness. This type of weakness can allow an attacker to overwrite memory, leading to control over program execution and privilege escalation.

Why is CVE-2023-23376 relevant for organizations?

This flaw allows an attacker with local access to escalate privileges, potentially leading to unauthorized data access, modification, or system disruption. Successful exploitation poses a high business risk due to the possibility of widespread system compromise.

What steps should be taken to address this vulnerability?

Organizations should identify systems running affected Windows versions and apply vendor-provided updates. Limiting local access to critical systems can also mitigate risk. Verifying that remediation efforts have been successful is crucial.

References