Advisory Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of NSF Unidata NetCDF-C. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of time units. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user.

06/03/25 - ZDI reported the vulnerability to the vendor
06/08/25 – the vendor acknowledged the receipt of the report
06/25/25 - ZDI asked for updates
11/06/25 – ZDI asked for updates
12/05/25 – ZDI notified the vendor of the intention to publish the case as a 0-day advisory on 12/18/25

-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the product

• 2025-06-04 - Vulnerability reported to vendor
• 2025-12-18 - Coordinated public release of advisory
• 2025-12-18 - Advisory Updated