CVE-2022-44547 in HarmonyOS
Summary
by MITRE • 11/10/2022
The Display Service module has a UAF vulnerability. Successful exploitation of this vulnerability may affect the display service availability.
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Analysis
by VulDB Data Team • 12/11/2022
The vulnerability identified as CVE-2022-44547 represents a use-after-free condition within the Display Service module of a target system. This type of vulnerability occurs when a program continues to reference memory after it has been freed, creating potential opportunities for malicious actors to exploit the system's memory management mechanisms. The Display Service module is responsible for managing graphical user interface elements and visual rendering components, making it a critical subsystem that requires robust security controls. Such vulnerabilities typically arise from improper memory deallocation practices where developers fail to properly invalidate pointers or nullify references after memory release operations.
The technical flaw manifests as a memory safety issue that can be exploited through crafted inputs or specific operational sequences that trigger the vulnerable code path. When the Display Service module processes certain display-related operations, it may execute code that frees memory associated with display objects while simultaneously maintaining references to that memory location. This creates a window of opportunity for attackers to manipulate the freed memory, potentially leading to arbitrary code execution or service disruption. The vulnerability falls under the CWE-416 category of Use After Free, which is classified as a serious memory safety issue that can result in system compromise. The attack surface is particularly concerning given that display services are often integral to user interaction and system functionality.
The operational impact of this vulnerability extends beyond simple service availability concerns to potentially encompass full system compromise. When an attacker successfully exploits the use-after-free condition, they may be able to execute malicious code within the context of the Display Service process, which could lead to privilege escalation depending on the service's execution permissions. The disruption of display service availability could manifest as system crashes, graphical interface failures, or complete system lockups that prevent normal user operations. From an adversary perspective, this vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as exploitation may involve injecting malicious code into the display service process. The impact is particularly severe in environments where display services are critical to system operation or where the service runs with elevated privileges.
Mitigation strategies for CVE-2022-44547 should prioritize immediate patch deployment from the vendor, as this represents a critical security flaw that requires architectural fixes rather than simple configuration changes. Organizations should implement memory safety monitoring tools and runtime protections such as address space layout randomization and heap corruption detection mechanisms. The implementation of code review processes specifically focused on memory management practices can help prevent similar issues in future development cycles. Additionally, network segmentation and privilege separation should be enforced to limit the potential impact of exploitation. Security teams should monitor for indicators of compromise related to unauthorized access to display services and implement intrusion detection systems that can identify anomalous behavior patterns associated with memory corruption attacks. Regular security assessments of display-related subsystems should be conducted to identify and remediate similar vulnerabilities before they can be exploited by threat actors.