SANS Stormcast Friday, January 9th, 2026: Gephi Analysis; zlib vuln; GnuPG Vulns; Cisco/Cloudflare DNS Issue

from SANS Internet Stormcenter Daily Cyber Security Podcast (Stormcast) · host Dr. Johannes B. Ullrich

Analysis using Gephi with DShield Sensor Data Gephi is a neat tool to create interactive data visualizations. It can be applied to honeypot data to find data clusters. https://isc.sans.edu/diary/Analysis%20using%20Gephi%20with%20DShield%20Sensor%20Data/32608 zlib v1.3.1.2 Global Buffer Overflow in TGZfname() of zlib untgz Utility The untgz utility that is part of zlib suffers from a straightforward buffer overflow in the filename parameter https://seclists.org/fulldisclosure/2026/Jan/3 GnuPG Vulnerabilities Several vulnerabilities in GnuPG were disclosed during a recent talk at the CCC congress. https://gpg.fail Cisco DNS Bug Reboot Last night, several Cisco users reported that their switches rebooted. The issue appears to be related to a change Cloudflare made in the order of CNAME records. Only users using 1.1.1.1 as a recursive resolver appear to be affected. https://community.cisco.com/t5/switches-small-business/got-fatal-error-cbs350-24t-4g/td-p/5359883?utm_source=chatgpt.com

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Daily 5 min cyber security news summary. News, patches, vulnerabilities and trends in information and network security. SANS Stormcast Friday, January 9th, 2026: Gephi Analysis; zlib vuln; GnuPG Vulns; Cisco/Cloudflare DNS Issue

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SANS Stormcast Friday, January 9th, 2026: Gephi Analysis; zlib vuln; GnuPG Vulns; Cisco/Cloudflare DNS Issue

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This episode was published on January 9, 2026.

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Analysis using Gephi with DShield Sensor Data Gephi is a neat tool to create interactive data visualizations. It can be applied to honeypot data to find data...

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