ntop ntopng up to 6.7.260720 reloadBlacklist src/IpAddress.cpp ndpi_get_custom_category_match stack-based overflow

Summaryinfo

A vulnerability was found in ntop ntopng up to 6.7.260720. It has been classified as problematic. This affects the function ndpi_get_custom_category_match of the file src/IpAddress.cpp of the component reloadBlacklist. This manipulation causes stack-based overflow. This vulnerability is tracked as CVE-2026-97371. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in ntop ntopng up to 6.7.260720 and classified as problematic. Affected by this vulnerability is the function ndpi_get_custom_category_match of the file src/IpAddress.cpp of the component reloadBlacklist. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect availability. The summary by CVE is:

ntopng is a web-based network traffic monitoring application. Prior to 6.7.260721, ndpi_get_custom_category_match writes a four-byte nDPI protocol-category value through a pointer to the two-byte id variable in IpAddress::reloadBlacklist in src/IpAddress.cpp during packet dissection and host initialization. A remote unauthenticated attacker on a monitored network segment can send packets that match custom-category rules, causing stack corruption and denial of service without user interaction. This issue is fixed in version 6.7.260721.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-97371 since 09/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.7.260721 eliminates this vulnerability.

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Productinfo

Vendor

• ntop

Name

• ntopng

Version

• 6.7.260720

Website

• Product: https://github.com/ntop/ntopng/

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