A brief daily summary of what is important in information security. The podcast is published every weekday and designed to get you ready for the day with a brief, usually 5 minute long, summary of current network security related events. The content is late breaking, educational and based on listener input as well as on input received by the SANS Internet Stormcenter. You may submit questions and comments via our contact form at https://isc.sans.edu/contact.html .
SANS Stormcast Monday, December 22nd, 2025: TLS Callbacks; FreeBSD RCE; NIST Time Server Issues
December 21, 2025
6:00
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DLLs & TLS Callbacks
As a follow-up to last week's diary about DLL Entrypoints, Didier is looking at TLS ( Thread Local Storage ) and how it can be abused.
https://isc.sans.edu/diary/DLLs%20%26%20TLS%20Callbacks/32580
FreeBSD Remote code execution via ND6 Router Advertisements
A critical vulnerability in FreeBSD allows for remote code execution. But an attacker must be on the same network.
https://www.freebsd.org/security/advisories/FreeBSD-SA-25:12.rtsold.asc
NIST Time Server Problems
The atomic ensemble time scale at the NIST Boulder campus has failed due to a prolonged utility power outage. One impact is that the Boulder Internet Time Services no longer have an accurate time reference.
https://tf.nist.gov/tf-cgi/servers.cgi https://groups.google.com/a/list.nist.gov/g/internet-time-service/c/o0dDDcr1a8I