CVE-2024-43093
CVE-2024-43093 allows a local privilege escalation due to incorrect unicode normalization in ExternalStorageProvider.java. This vulnerability could allow unauthorized access to sensitive directories, requiring user interaction for exploitation.
CVE-2024-43093 is a local escalation of privilege vulnerability affecting ExternalStorageProvider.java. The vulnerability arises from a flaw in the file path filter within the ExternalStorageProvider, specifically in the shouldHideDocument function. The incorrect unicode normalization can bypass security measures meant to prevent access to sensitive areas. Although it requires user interaction, successful exploitation could lead to unauthorized access. Given its association with active exploits and presence in the CISA KEV catalog, prompt attention is advised, even though the SVRS score is 75. This highlights the importance of addressing this security flaw to prevent potential abuse, especially in environments where user interaction can be engineered.
Description
CVE-2024-43093 describes a vulnerability in the ExternalStorageProvider.java file that allows potential bypass of a file path filter. This vulnerability is caused by incorrect Unicode normalization, which can lead to local escalation of privilege. User interaction is required for exploitation.
The SVRS for this vulnerability is 36, which is below the critical threshold of 80. However, despite the lower SVRS, the vulnerability is considered high-risk due to its presence "In The Wild", the availability of active exploits, and the involvement of a known threat actor group, Lazarus Group.
Key Insights
- Exploitation Requires User Interaction: This vulnerability requires user interaction for successful exploitation, meaning that it might not be exploited remotely. However, attackers can use social engineering techniques to trick users into clicking malicious links or downloading compromised files.
- Local Escalation of Privilege: Successful exploitation of this vulnerability allows attackers to escalate their privileges within the affected system. This can give them access to sensitive data, critical system resources, and potentially even allow them to execute arbitrary code.
- Active Exploits: Active exploits have been published and are being used in the wild by threat actors. This indicates that attackers are actively exploiting this vulnerability, making it a critical threat.
- Threat Actor Involvement: The Lazarus Group, a known state-sponsored cybercrime group, is actively using this vulnerability. This suggests that sophisticated and well-resourced adversaries are exploiting this flaw, making it a significant concern for organizations.
Mitigation Strategies
- Patching: The most effective mitigation strategy is to patch the affected software immediately. This will close the vulnerability and prevent attackers from exploiting it.
- Security Awareness Training: Regular security awareness training for all employees is critical. This training should educate users about social engineering tactics, how to identify malicious links and attachments, and the importance of reporting suspicious activities.
- Network Segmentation: Implementing strong network segmentation can limit the impact of a successful attack. By segmenting the network into different zones with controlled access, you can prevent attackers from spreading laterally across your system.
- File Path Filter Validation: Organizations should thoroughly review and validate all file path filters, including those for Unicode normalization, to ensure they are secure and prevent potential bypasses.
Additional Information
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Indicators of Compromise
Exploits
News
Social Media
Affected Software
References
CWE Details
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