External risk intelligence

Apple Operating Systems Privilege Escalation Risk

CVE advisoryKnown Exploit

CVE-2021-1782

A race condition in Apple operating systems could allow a malicious application to gain elevated privileges, impacting affected devices. This vulnerability may have been actively exploited, presenting a risk of unauthorized system access and data compromise. Prompt application of vendor updates is advised.

1Halo Surface Signal

Apple Ipados

before 14.410.14 to before 10.14.610.15 to before 10.15.710.14.610.15.711.0 to before 11.2before 7.3

External exposure likelihood

Halo Surface Signal score for CVE-2021-1782

The vulnerability affects local operating system components and requires a malicious application to be running on the device to elevate privileges. It is not an internet-facing service, network protocol, or web application, making it inherently local in scope and not reachable via public network exposure.

Horizon Alert

Summary of the vulnerability and why it matters

A race condition vulnerability has been identified within Apple's operating systems. This flaw could permit a malicious application to gain elevated privileges on an affected system. Apple has stated that this vulnerability may have been actively exploited.

  • Vulnerable operating systems and applications.
  • Flaw allows privilege escalation.
  • Potential for unauthorized system access.

Attack Path

How an attacker could exploit the issue

An attacker could exploit a race condition in the operating system to gain elevated privileges. This would involve a malicious application running on the targeted device. By manipulating the timing of operations, the attacker could cause the system to grant unintended access. This could lead to unauthorized control over system functions and data.

  • Malicious app exposure required.
  • Attacker exploits timing.
  • Control and impact result.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability presents a significant risk due to the potential for privilege escalation. A malicious application could gain elevated access, impacting system integrity and data confidentiality. Given that this issue has been reported as actively exploited, organizations should consider it a high-priority threat.

  • Attacker skill level: High
  • Required access or conditions: Local access
  • Business risk or urgency: High impact

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

A vulnerability in Apple operating systems could permit a malicious application to gain elevated privileges. This could impact systems running affected versions of iOS, iPadOS, macOS, tvOS, and watchOS. The vendor has released updates to address this vulnerability, and reports indicate it may have been actively exploited.

  • Identify affected systems and software.
  • Isolate systems if updates are not immediately possible.
  • Apply vendor updates and verify their implementation.
  • Monitor systems for anomalous activity.

Frequently asked questions

What Apple operating systems are impacted by CVE-2021-1782, and what is the primary risk?

CVE-2021-1782 affects iOS, iPadOS, macOS, tvOS, and watchOS. The primary risk is that a malicious application could elevate its privileges on an affected system.

How does CVE-2021-1782 enable privilege escalation?

This vulnerability is a race condition (CWE-667), a weakness where operations occur in an unpredictable order due to timing. A malicious application can exploit this by manipulating event sequences to gain higher access levels than intended.

What is the attack path for CVE-2021-1782, and what is the scope of impact?

The attack requires a malicious application to be present on the targeted device. The vulnerability allows for privilege escalation, meaning the malicious app can gain more control over the system than it should have.

What is the significance of CVE-2021-1782 being reported as actively exploited?

The reporting that CVE-2021-1782 may have been actively exploited indicates a significant threat. Organizations should prioritize addressing this vulnerability due to the potential for unauthorized system access and impact on system integrity and data confidentiality. Organizations can refer to CISA's Known Exploited Vulnerabilities catalog for details.

What steps should be taken to respond to CVE-2021-1782?

To respond, identify all affected systems and software versions. If immediate updates are not feasible, consider isolating vulnerable systems. Promptly apply vendor-provided updates and confirm their successful implementation. Continuous monitoring of systems for any unusual activity is also recommended.

References