Fcambuso

**Name of the Vulnerable Software and Affected Versions** NLnet Labs NSD version 4.2.0 ALT Linux (affected versions not specified) **Description** The issue is related to a Stack-based Buffer Overflow in the `dname concatenate()` function in `dname.c`, which is part of the `nsd-checkzone` tool in NLnet Labs NSD. This overflow occurs due to insufficient validation of input data. **Recommendations** For NLnet Labs NSD version 4.2.0, consider restricting access to the `nsd-checkzone` tool until a patch is available. For ALT Linux, at the moment, there is no information about a newer version that contains a fix for this vulnerability.