The 2.24 version is outdated, and the primary recommendation from the NSSM developers is to upgrade to the 2.25 pre-release builds, which address several bugs, including those related to service handling and stability. Immediate Mitigation Steps:
While less severe than the permission-based flaws, this behavior creates an opportunity for a Denial of Service (DoS) or a window of "chaos" where event logs are flooded with restarts, potentially masking a secondary exploit. It also forces the SCM to repeatedly reinitialize the service environment, increasing the probability of race conditions if an attacker is timing their binary replacement with the restart cycle.
: NSSM stores its service parameters in the Registry. If the permissions on these Registry keys are too loose, a user can modify the AppParameters or Application string to execute a different command when the service starts. nssm-2.24 privilege escalation
The directory where the nssm.exe binary or the target application executable resides has "Modify" or "Full Control" permissions granted to "Authenticated Users" or "Everyone."
These metrics indicate that any local user with minimal privileges can exploit this vulnerability without any user interaction, potentially compromising the entire system. : NSSM stores its service parameters in the Registry
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: An attacker gains low-level interactive access to the target system (e.g., through a compromised user account, phishing, or remote access trojan).
Proactive monitoring can catch misconfigurations before they are exploited.
: If an application uses NSSM to run a service but fails to enclose the path to in quotation marks (e.g., C:\Program Files\App\nssm.exe ), a local attacker can place a malicious file (like C:\Program.exe ) to gain elevated SYSTEM privileges upon a reboot. Insecure Executable Permissions : If the folder containing
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