CVE-2024-29014 in NetExtender
Summary
by MITRE • 07/18/2024
Vulnerability in SonicWall NetExtender Windows (32 and 64-bit) client 10.2.339 and earlier versions allows an attacker to arbitrary code execution when processing an EPC Client update.
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Analysis
by VulDB Data Team • 09/10/2024
The vulnerability identified as CVE-2024-29014 represents a critical arbitrary code execution flaw within SonicWall NetExtender Windows client software versions 10.2.339 and earlier. This issue specifically manifests during the processing of EPC Client updates, which are essential components for maintaining secure remote access connectivity through SonicWall's network security infrastructure. The vulnerability affects both 32-bit and 64-bit Windows implementations, broadening its potential impact across enterprise environments that rely on SonicWall's remote access solutions. The flaw resides in the client-side update mechanism that handles EPC (Enterprise Policy Client) components, creating an execution path where untrusted input can be manipulated to trigger code execution on the target system.
The technical nature of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and potentially CWE-787, representing out-of-bounds write vulnerabilities. Attackers can exploit this weakness by crafting malicious EPC Client update packages that, when processed by the vulnerable NetExtender client, will execute arbitrary code with the privileges of the affected user. The attack vector is particularly concerning as it requires minimal user interaction beyond the normal update process, making it susceptible to both targeted attacks and automated exploitation campaigns. The vulnerability's exploitation capability extends to privilege escalation scenarios where the executed code could potentially leverage user privileges to gain elevated system access, particularly in environments where users maintain administrative rights.
From an operational perspective, this vulnerability poses significant risk to organizations relying on SonicWall NetExtender for remote access management, as it could enable attackers to establish persistent access to corporate networks, exfiltrate sensitive data, or deploy additional malware. The impact extends beyond individual system compromise to potentially facilitate lateral movement within networks, especially when users connect to sensitive systems or databases through the compromised client. Organizations using SonicWall's remote access solutions may face regulatory compliance issues if this vulnerability is exploited, as it could lead to unauthorized access to protected data and potential data breaches. The vulnerability's presence in widely deployed client software means that successful exploitation could affect numerous endpoints across different organizations simultaneously.
Security professionals should prioritize immediate mitigation efforts including applying the vendor-provided patches and updates for SonicWall NetExtender client versions, as well as implementing network segmentation controls to limit the potential blast radius of exploitation. Additional defensive measures should include monitoring for unusual update activities, implementing network-based intrusion detection systems to detect malicious EPC update traffic, and establishing privileged access management controls to limit the impact of potential compromise. Organizations should also consider disabling automatic update functionality for EPC components until patches are verified and deployed across their environments. The vulnerability's characteristics align with ATT&CK technique T1059.007 for command and scripting interpreter, and T1566 for spearphishing, indicating potential attack paths through social engineering or automated exploitation. Regular security assessments should be conducted to verify that all client systems have been properly updated and that no legacy installations remain vulnerable to this specific exploit.