Summary
Netcore NR268 version 1.7.121109 contains an improper authentication vulnerability in the user_ok function used by its CGI execution component. A remotely located attacker may be able to bypass intended authentication checks when the affected request-processing path is reachable.
Netcore NR268 version 1.7.121109 contains an improper authentication vulnerability in the user_ok function used by its CGI execution component. A remotely located attacker may be able to bypass intended authentication checks when the affected request-processing path is reachable.
Affected context
The vulnerability occurs in Netcore NR268 1.7.121109 deployments where the CGI execution component processes requests through the affected user_ok authentication logic. Risk depends on whether the vulnerable interface is network-reachable and whether its authentication decisions protect administrative or otherwise sensitive functionality.
The vulnerability occurs in Netcore NR268 1.7.121109 deployments where the CGI execution component processes requests through the affected user_ok authentication logic. Risk depends on whether the vulnerable interface is network-reachable and whether its authentication decisions protect administrative or otherwise sensitive functionality.
Exploit preconditions
- Attack surface: Network-accessible CGI execution interface
- Required access: No valid credentials may be required if authentication can be bypassed
- Trigger point: Request handling that invokes the affected user_ok function
- Why exploitation is possible: Improper authentication logic may accept a request without correctly establishing or verifying the required identity
- Attack surface: Network-accessible CGI execution interface
- Required access: No valid credentials may be required if authentication can be bypassed
- Trigger point: Request handling that invokes the affected user_ok function
- Why exploitation is possible: Improper authentication logic may accept a request without correctly establishing or verifying the required identity
Why this happens
The underlying bug is an authentication decision failure in the user_ok function. The component does not reliably enforce the intended identity or credential checks before allowing access to protected CGI functionality. This behavior maps to CWE-287, Improper Authentication, in which an application fails to adequately verify that a requester is the claimed identity before granting access.
The underlying bug is an authentication decision failure in the user_ok function. The component does not reliably enforce the intended identity or credential checks before allowing access to protected CGI functionality. This behavior maps to CWE-287, Improper Authentication, in which an application fails to adequately verify that a requester is the claimed identity before granting access.
Potential impact
- An attacker may bypass authentication controls.
- An attacker could access administrative or protected CGI functionality.
- Sensitive configuration or operational data may be exposed.
- An attacker may modify device settings or disrupt service.
- The device could be used as a foothold for further network activity.
- An attacker may bypass authentication controls.
- An attacker could access administrative or protected CGI functionality.
- Sensitive configuration or operational data may be exposed.
- An attacker may modify device settings or disrupt service.
- The device could be used as a foothold for further network activity.
General mitigation guidance
Mitigation generally focuses on ensuring that every protected CGI route
performs centralized, fail-closed authentication and authorization before
processing the requested operation.
Common defensive patterns include:
- Replacing fragmented authentication checks with a well-tested, shared
authentication mechanism.
- Validating credentials and session state independently of user-supplied
identity fields.
- Denying access by default when authentication state is missing, malformed,
expired, or ambiguous.
- Restricting management interfaces to trusted networks or protected
administrative paths where feasible.
- Applying least privilege to authenticated accounts and CGI operations.
- Reducing exposure by disabling unused remote administration features.
Mitigation generally focuses on ensuring that every protected CGI route
performs centralized, fail-closed authentication and authorization before
processing the requested operation.
Common defensive patterns include:
- Replacing fragmented authentication checks with a well-tested, shared
authentication mechanism.
- Validating credentials and session state independently of user-supplied
identity fields.
- Denying access by default when authentication state is missing, malformed,
expired, or ambiguous.
- Restricting management interfaces to trusted networks or protected
administrative paths where feasible.
- Applying least privilege to authenticated accounts and CGI operations.
- Reducing exposure by disabling unused remote administration features.
How teams detect issues like this
Organizations can look for:
- Static-analysis findings involving authentication decisions based on
unvalidated request parameters or incomplete credential checks.
- Code-review signals such as duplicated login logic, fail-open branches,
missing session validation, or authorization performed after sensitive
processing.
- Web and device logs showing successful access to protected CGI endpoints
without a corresponding valid authentication event.
- Network monitoring for unexpected remote access to management interfaces.
- Policy enforcement requiring centralized authentication middleware and
negative tests for unauthenticated access to every protected route.
Automated security review tools may help identify inconsistent or
fail-open authentication patterns.
Organizations can look for:
- Static-analysis findings involving authentication decisions based on
unvalidated request parameters or incomplete credential checks.
- Code-review signals such as duplicated login logic, fail-open branches,
missing session validation, or authorization performed after sensitive
processing.
- Web and device logs showing successful access to protected CGI endpoints
without a corresponding valid authentication event.
- Network monitoring for unexpected remote access to management interfaces.
- Policy enforcement requiring centralized authentication middleware and
negative tests for unauthenticated access to every protected route.
Automated security review tools may help identify inconsistent or
fail-open authentication patterns.
Sources
| Source | Link |
|---|---|
| github. | github.com/ |
| vuldb. | vuldb.com/ |
| vuldb. | vuldb.com/ |
| vuldb. | vuldb.com/ |
| vuldb. | vuldb.com/ |
