CWE
476
Advisory Published
Updated

CVE-2023-38314: Null Pointer Dereference

First published: Fri Nov 17 2023(Updated: )

An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a NULL pointer dereference in preauthenticated() that can be triggered with a crafted GET HTTP request with a missing redirect query string parameter. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). Affected OpenNDS Captive Portal before version 10.1.2 fixed infixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on28. August 2023 by updating OpenNDS to version 10.1.3.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
OpenNDS Captive Portal<10.1.2

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Frequently Asked Questions

  • What is CVE-2023-38314?

    CVE-2023-38314 is a vulnerability in OpenNDS Captive Portal before version 10.1.2 that allows for a NULL pointer dereference in the preauthenticated() function.

  • What is the severity of CVE-2023-38314?

    The severity of CVE-2023-38314 is medium with a CVSS score of 6.5.

  • How does CVE-2023-38314 affect OpenNDS Captive Portal?

    CVE-2023-38314 affects OpenNDS Captive Portal version prior to 10.1.2.

  • How can CVE-2023-38314 be exploited?

    CVE-2023-38314 can be exploited by sending a crafted GET HTTP request with a missing redirect query string parameter to trigger a NULL pointer dereference in the preauthenticated() function, resulting in a denial-of-service (DoS) condition.

  • How can CVE-2023-38314 be fixed?

    To fix CVE-2023-38314, it is recommended to upgrade OpenNDS Captive Portal to version 10.1.2 or later.

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