CVE-2007-5057 in NetSupport Manager Client
Summary
by MITRE
NetSupport Manager Client before 10.20.0004 allows remote attackers to bypass the (1) basic and (2) authentication schemes by spoofing the NetSupport Manager.
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Analysis
by VulDB Data Team • 06/04/2025
The vulnerability identified as CVE-2007-5057 represents a critical authentication bypass flaw in NetSupport Manager Client versions prior to 10.20.0004. This issue stems from insufficient validation mechanisms within the client software that fails to properly verify the authenticity of connecting systems. The vulnerability specifically affects both basic and authentication schemes, creating a pathway for malicious actors to impersonate legitimate NetSupport Manager clients and gain unauthorized access to targeted systems.
The technical flaw manifests through a spoofing mechanism that allows remote attackers to present false client identities to the NetSupport Manager server. This occurs because the client software does not adequately validate the source of connection requests, enabling attackers to forge client certificates or connection parameters that appear legitimate to the server. The vulnerability operates at the network protocol level where authentication tokens and connection metadata are not sufficiently cryptographically verified before granting access privileges.
From an operational perspective, this vulnerability poses significant risks to organizations relying on NetSupport Manager for remote system administration and support. Attackers exploiting this flaw can establish unauthorized remote sessions, potentially gaining full administrative control over managed systems without proper authentication. The impact extends beyond simple unauthorized access as it can enable lateral movement within networks, data exfiltration, and persistent backdoor establishment. This vulnerability directly violates the principle of least privilege and undermines the fundamental security model of remote management systems.
The vulnerability aligns with CWE-287, which addresses improper authentication issues, and maps to ATT&CK technique T1078.004 for valid accounts and T1566 for spearphishing with a malicious attachment. Organizations should immediately update to NetSupport Manager Client version 10.20.0004 or later, which implements proper authentication validation mechanisms. Additional mitigations include network segmentation, implementing strict firewall rules limiting access to NetSupport Manager servers, and deploying intrusion detection systems to monitor for suspicious connection patterns. Security administrators should also conduct thorough audits of existing connections and implement multi-factor authentication where possible to reduce the attack surface and provide defense-in-depth protection against similar vulnerabilities.