CVE-2023-41101
Opennds remote code execution
- Published17 Nov 2023
Description
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. get_query in http_microhttpd.c does not validate the length of the query string of GET requests. This leads to a stack-based buffer overflow in versions 9.x and earlier, and to a heap-based buffer overflow in versions 10.x and later. Attackers may exploit the issue to crash OpenNDS (Denial-of-Service condition) or to inject and execute arbitrary bytecode (Remote Code Execution). Affected OpenNDS before version 10.1.3 fixed in OpenWrt master and OpenWrt 23.05 on 23. November by updating OpenNDS to version 10.2.0.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
Frequently asked
Is CVE-2023-41101 being actively exploited?
CVE-2023-41101 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.89%.
How severe is CVE-2023-41101?
CVE-2023-41101 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.89% probability of exploitation.
Which products are affected by CVE-2023-41101?
Affected products include Opennds.
How do I fix CVE-2023-41101?
Upgrade affected software to a fixed version, for example Opennds 10.1.3 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2023-41101 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.