CVE-2022-36840 in Update Setup
Summary
by MITRE • 08/05/2022
DLL hijacking vulnerability in Samsung Update Setup prior to version 2.2.9.50 allows attackers to execute arbitrary code.
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Analysis
by VulDB Data Team • 09/03/2022
The CVE-2022-36840 vulnerability represents a critical dll hijacking flaw discovered in Samsung Update Setup software versions prior to 2.2.9.50. This vulnerability stems from improper dynamic link library loading mechanisms within the software installation process, creating opportunities for malicious code execution. The flaw specifically affects the way the setup program resolves and loads required libraries, allowing attackers to place malicious dll files in strategic locations where the legitimate software will attempt to load them. This type of vulnerability falls under the broader category of improper library loading as classified by CWE-426, which directly maps to the software's failure to properly validate library paths during dynamic loading operations. The attack vector leverages the Windows dynamic loading mechanism where applications search for required libraries in a specific order, and if a malicious library is placed in an early search location, it will be loaded instead of the legitimate one.
The technical implementation of this vulnerability involves the setup program's reliance on the system PATH environment variable and default library search order without proper validation or sandboxing. When Samsung Update Setup executes, it attempts to load several dependent libraries including those required for system integration and update functionality. Attackers can exploit this by placing a maliciously crafted dll file in a directory that appears earlier in the search path than the legitimate library location. This allows the malicious code to execute with the privileges of the setup process, which typically runs with elevated permissions during installation. The vulnerability is particularly concerning because it does not require user interaction beyond the initial installation attempt, making it a passive attack vector that can be exploited during routine software updates. The flaw operates at the operating system level and is classified under the ATT&CK technique T1550.003 for hijacking execution flows through dynamic-link library injection.
The operational impact of this vulnerability extends beyond simple code execution, as it can lead to complete system compromise through privilege escalation and persistent malware deployment. When exploited, the malicious dll can establish backdoors, exfiltrate sensitive data, or deploy additional payloads that maintain persistence on the compromised system. The vulnerability affects any system running Samsung Update Setup version 2.2.9.50 or earlier, making it particularly dangerous in enterprise environments where Samsung devices are commonly deployed. Security researchers have noted that this type of attack can be particularly effective against older systems or those with outdated security patches, as the attack chain requires minimal user interaction and can be automated. The vulnerability also poses risks to system integrity and can potentially be combined with other exploits to create more sophisticated attack chains. Organizations running affected software versions should consider immediate remediation as the attack surface remains open for exploitation, and the vulnerability can be leveraged for lateral movement within networks where Samsung devices are prevalent. The proper mitigation approach involves updating to Samsung Update Setup version 2.2.9.50 or later, which implements proper library loading validation and path resolution mechanisms.