Tag: fans

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 […]

A phishing campaign with QR codes rendered using an HTML table Phishing emails are bypassing filters by encoding QR codes as HTML tables. https://isc.sans.edu/diary/A%20phishing%20campaign%20with%20QR%20codes%20rendered%20using%20an%20HTML%20table/32606 n8n vulnerabilities In recent days, several new n8n vulnerabilities were disclosed. Ensure that you update any on-premises installations and carefully consider what to use n8n for. https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858 https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg Power bank feature […]

Tool Review: Tailsnitch Tailsnitch is a tool to audit your Tailscale configuration. It does a comprehensive analysis of your configuration and suggests (or even applies) fixes. https://isc.sans.edu/diary/Tool%20Review%3A%20Tailsnitch/32602 D-Link DSL Command Injection via DNS Configuration Endpoint A new vulnerability in very old D-Link DSL modems is currently being exploited. https://www.vulncheck.com/advisories/dlink-dsl-command-injection-via-dns-configuration-endpoint TOTOLINK EX200 firmware-upload error handling can […]

Risks of OOB Access via IP KVM Devices Recently, cheap IP KVMs have become popular. But their deployment needs to be secured. https://isc.sans.edu/diary/Risks%20of%20OOB%20Access%20via%20IP%20KVM%20Devices/32598 Tailsnitch Tailsnitch is a tool to review your Tailscale configuration for vulnerabilities https://github.com/Adversis/tailsnitch Net-SNMP snmptrapd vulnerability A new vulnerability in snmptrapd may lead to remote code execution https://github.com/net-snmp/net-snmp/security/advisories/GHSA-4389-rwqf-q9gq

Cryptocurrency Scam Emails and Web Pages As We Enter 2026 Scam emails are directing victims to confidence scams attempting to steal cryptocurrencies. https://isc.sans.edu/diary/Cryptocurrency%20Scam%20Emails%20and%20Web%20Pages%20As%20We%20Enter%202026/32594 Debugging DNS response times with tshark tshark is a powerful tool to debug DNS timing issues. https://isc.sans.edu/diary/Debugging+DNS+response+times+with+tshark/32592/ Old Fortinet Devices Have not been updated Over 10,000 Fortinet devices are still vulnerable to […]

MongoDB Unauthenticated Attacker Sensitive Memory Leak CVE-2025-14847 Over the Christmas holiday, MongoDB patched a sensitive memory leak vulnerability that is now actively being exploited https://www.mongodb.com/community/forums/t/important-mongodb-patch-available/332977 https://github.com/mongodb/mongo/commit/505b660a14698bd2b5233bd94da3917b585c5728 https://www.ox.security/blog/attackers-could-exploit-zlib-to-exfiltrate-data-cve-2025-14847/ https://github.com/joe-desimone/mongobleed/

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 […]

Positive trends related to public IP range from the year 2025 Fewer ICS systems, as well as fewer systems with outdated SSL versions, are exposed to the internet than before. The trend isn t quite clean for ISC, but SSL2 and SSL3 systems have been cut down by about half. https://isc.sans.edu/diary/Positive%20trends%20related%20to%20public%20IP%20ranges%20from%20the%20year%202025/32584 Hewlett-Packard Enterprise OneView Software, […]

Maybe a Little Bit More Interesting React2Shell Exploit Attackers are branching out to attack applications that initial exploits may have missed. The latest wave of attacks is going after less common endpoints and attempting to exploit applications that do not have Next.js exposed. https://isc.sans.edu/diary/Maybe%20a%20Little%20Bit%20More%20Interesting%20React2Shell%20Exploit/32578 UAT-9686 actively targets Cisco Secure Email Gateway and Secure Email and […]

Beyond RC4 for Windows authentication Microsoft outlined its transition plan to move away from RC4 for authentication and published guidance and tools to facilitate this change. https://www.microsoft.com/en-us/windows-server/blog/2025/12/03/beyond-rc4-for-windows-authentication FortiCloud SSO Login Vuln Exploited Arctic Wolf observed exploit attempts against vulnerable FortiGate appliances. https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logins-following-disclosure-cve-2025-59718-cve-2025-59719/ FrePBX Vulnerability Horizon3.ai identified three distinct vulnerabilities in FreePBX. In particular, the authentication […]