External risk intelligence

Microsoft Streaming Service Privilege Escalation Vulnerability.

CVE advisoryKnown Exploit

CVE-2023-29360

A flaw in the Microsoft Streaming Service could allow an attacker with local access to elevate privileges. This impacts affected Windows systems, posing a business risk of unauthorized system control.

1Halo Surface Signal

Microsoft Windows 10 1607

before 10.0.14393.5989before 10.0.17763.4499before 10.0.19044.3086before 10.0.19045.3086before 10.0.22000.2057before 10.0.22621.1848before 10.0.20348.1784

External exposure likelihood

Halo Surface Signal score for CVE-2023-29360

The vulnerability affects a local streaming service component within the Windows operating system. It requires local access to the system to exploit, meaning it is not reachable over the public internet and operates within the local execution environment.

Horizon Alert

Summary of the vulnerability and why it matters

The Microsoft Streaming Service contains a flaw that could allow an attacker to elevate their privileges. This vulnerability is related to how the service handles pointers, potentially enabling unauthorized access to higher levels of system control. Organizations using affected versions of Windows are exposed to potential business risks if this flaw is exploited.

  • Vulnerable Microsoft Streaming Service
  • Flaw allows privilege elevation
  • Business risk of unauthorized control

Attack Path

How an attacker could exploit the issue

This vulnerability in the Microsoft Streaming Service allows an attacker with local access to elevate their privileges. This could enable an attacker to gain SYSTEM-level control over the affected system. The exploitation requires the attacker to already have a foothold on the targeted machine.

  • Local system access is required.
  • Attacker triggers a vulnerability.
  • Attacker gains SYSTEM privileges.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in the Microsoft Streaming Service allows for an elevation of privilege. Attackers with local access to a system could potentially exploit this to gain higher-level permissions, impacting the confidentiality, integrity, and availability of data. The potential for elevated privileges suggests a significant business risk.

  • Low attacker skill level
  • Requires local access
  • High business risk

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in the Microsoft Streaming Service could allow an attacker with local access to elevate their privileges on affected systems. Organizations should take immediate steps to understand their exposure, reduce potential risk, and implement vendor-provided security updates. Following these actions, validation and ongoing monitoring are critical to confirm the effectiveness of the remediation and detect any related malicious activity.

  • Identify systems with the vulnerable service.
  • Limit local access to affected systems.
  • Apply vendor patches and verify.
  • Monitor for related activity.

Frequently asked questions

What is the Microsoft Streaming Service in Windows?

The Microsoft Streaming Service is a Windows component used for managing and playing media streams on a system. It's integral to how Windows handles various streaming functionalities.

How does CVE-2023-29360 enable privilege escalation?

CVE-2023-29360 is linked to CWE-822. This flaw within the Microsoft Streaming Service permits a local attacker to escalate their privileges, potentially leading to SYSTEM-level control over the affected computer.

What conditions are needed to exploit this vulnerability?

Exploitation requires an attacker to already have local access to the targeted system. The vulnerability allows for privilege escalation, meaning an attacker can gain higher system permissions.

What is the relevance of CVE-2023-29360 according to CISA's Known Exploited Vulnerabilities catalog?

CISA added CVE-2023-29360 to its Known Exploited Vulnerabilities catalog on February 29, 2024, indicating active exploitation concerns. This suggests the vulnerability has been used in real-world attacks.

What steps should organizations take to address this vulnerability?

Organizations should identify affected systems, restrict local access, and apply vendor security updates promptly. Verifying the implementation of patches and continuous monitoring for suspicious activity are also crucial steps.

References