External risk intelligence

Microsoft Windows Privilege Escalation Vulnerability

CVE advisoryKnown Exploit

CVE-2019-0880

A local privilege escalation vulnerability in Windows' splwow64.exe component allows attackers with system access to gain higher permissions. This impacts affected Windows systems, potentially leading to unauthorized data access or modifications. The realistic business risk involves compromised system integrity and una

1Halo Surface Signal

Microsoft Windows 10 1507

r2

External exposure likelihood

Halo Surface Signal score for CVE-2019-0880

The vulnerability involves a local elevation of privilege within a specific Windows system component (splwow64.exe). It requires local access to the system to exploit and is not network-reachable or exposed to the public internet.

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability in the splwow64.exe component of Windows allows for privilege escalation. This flaw enables an attacker with local access to gain higher permissions on an affected system. The impact of such an exploit could compromise system integrity and potentially lead to unauthorized access or modifications.

  • Vulnerable component: splwow64.exe
  • Core weakness: Improper handling of calls
  • Main business impact: Privilege escalation on affected systems

Attack Path

How an attacker could exploit the issue

A local elevation of privilege vulnerability exists within the splwow64.exe component of Windows. This vulnerability allows an attacker to escalate privileges on a compromised system. Exploitation requires an attacker to have already gained initial access to the affected system.

  • Local system access required.
  • Attacker triggers vulnerable call.
  • Privilege escalation occurs.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability allows an attacker with local access to a system to elevate their privileges. The exploit targets a specific component within Windows that handles print spooler functions. Successful exploitation could grant an attacker higher levels of access, potentially leading to unauthorized modifications or data access on the affected system. Organizations should consider addressing this to mitigate potential business risks associated with unauthorized privilege escalation.

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

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability allows an attacker to elevate privileges on a system, potentially leading to unauthorized access and control. An attacker could exploit this by executing malicious code on an affected system, thereby gaining higher levels of access than initially permitted. This could impact the integrity and confidentiality of data residing on the compromised systems.

  • Identify systems with the vulnerable software.
  • Reduce exposure by limiting access.
  • Apply vendor updates and verify.
  • Monitor for related suspicious activity.

Frequently asked questions

What is the Microsoft splwow64 Elevation of Privilege Vulnerability (CVE-2019-0880)?

CVE-2019-0880 is a local privilege escalation vulnerability in Microsoft Windows, specifically within the splwow64.exe component. It allows an attacker with local access to elevate their privileges on an affected system.

What type of weakness does CVE-2019-0880 represent?

This vulnerability is classified as an elevation of privilege, stemming from an improper handling of certain calls within the splwow64.exe process.

How can an attacker exploit CVE-2019-0880, and what is the scope of impact?

An attacker with local system access can trigger the vulnerability by executing malicious code. This leads to privilege escalation, granting them higher access levels on the affected system. The scope is limited to the local system as it requires initial access.

Why is CVE-2019-0880 considered relevant for security advisories like the CISA KEV catalog?

CVE-2019-0880 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog, indicating it has been actively exploited in the wild. This makes it a priority for organizations to address to prevent further compromise.

What steps should an organization take to respond to CVE-2019-0880?

Organizations should identify affected systems, apply vendor-provided updates, and consider limiting access to mitigate the risk of exploitation. Continuous monitoring for suspicious activity is also recommended.

References