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 .
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SANS Stormcast Wednesday Mar 26th: XWiki Exploit; File Converter Correction; VMWare Vulnerability; Draytek Router Reboots; MMC Exploit Details;
XWiki Search Vulnerablity Exploit Attempts (CVE-2024-3721) Our honeypot detected an increase in exploit attempts for an XWiki command injection vulnerablity. The vulnerability was patched last April, but appears to be exploited more these last couple days. The vulnerability affects the search feature and allows the attacker to inject Groovy code templates. https://isc.sans.edu/diary/X-Wiki%20Search%20Vulnerability%20exploit%20attempts%20%28CVE-2024-3721%29/31800 Correction: FBI Image Converter Warning The FBI's Denver office warned of online file converters, not downloadable conversion tools https://www.fbi.gov/contact-us/field-offices/denver/news/fbi-denver-warns-of-online-file-converter-scam VMWare Vulnerability Broadcom released a fix for a VMWare Tools vulnerability. The vulnerability allows users of a Windows virtual machine to escalate privileges within the machine. https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25518 Draytek Reboots Over the weekend, users started reporting Draytek routers rebooting and getting stuck in a reboot loop. Draytek now published advise as to how to fix the problem. https://faq.draytek.com.au/docs/draytek-routers-rebooting-how-to-solve-this-issue/ Microsoft Managemnt Console Exploit CVE-2025-26633 TrendMicro released details showing how the MMC vulnerability Microsoft patched as part of its patch tuesday this month was exploited. https://www.trendmicro.com/en_us/research/25/c/cve-2025-26633-water-gamayun.html
SANS Stormcast Tuesday Mar 25th: Privacy Awware Bots; Ingress Nightmare; Malicious File Converters; VSCode Extension Leads to Ransomware
Privacy Aware Bots A botnet is using privacy as well as CSRF prevention headers to better blend in with normal browsers. However, in the process they may make it actually easier to spot them. https://isc.sans.edu/diary/Privacy%20Aware%20Bots/31796 Critical Ingress Nightmare Vulnerability ingress-nginx fixed four new vulnerabilities, one of which may lead to a Kubernetes cluster compromise. Note that at the time I am making this live, not all of the URLs below are available yet, but I hope they will be available shortly after publishing this podcast https://www.darkreading.com/application-security/critical-ingressnightmare-vulns-kubernetes-environments https://www.wiz.io/blog/ingress-nginx-kubernetes-vulnerabilities https://kubernetes.io/blog/ FBI Warns of File Converter Scams File converters may include malicious ad ons. Be careful where you get your software from. https://www.fbi.gov/contact-us/field-offices/denver/news/fbi-denver-warns-of-online-file-converter-scam VSCode Extension Includes Ransomware https://x.com/ReversingLabs/status/1902355043065500145
SANS Stormcast Monday Mar 24th: Critical Next.js Vulnerability; Microsoft Trust Signing Platform Abuse
Critical Next.js Vulnerability CVE-2025-29927 A critical vulnerability in how the x-middleware-subrequest header is verified may lead to bypassing authorization in Next.js applications. https://zhero-web-sec.github.io/research-and-things/nextjs-and-the-corrupt-middleware https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw https://www.runzero.com/blog/next-js/ Microsoft Trust Signing Service Abused Attackers abut the Microsoft Trust Signing Service, a service meant to help developers create signed software, to obtain short lived signatures for malware. https://www.bleepingcomputer.com/news/security/microsoft-trust-signing-service-abused-to-code-sign-malware/
SANS Stormcast Friday Mar 21st: New Data Feeds; SEO Spam; Veeam Deserialization; IBM AIX RCE;
Some New Data Feeds and Little Incident We started offering additional data feeds, and an SEO spamer attempted to make us change a link from an old podcast episode. https://isc.sans.edu/diary/Some%20new%20Data%20Feeds%2C%20and%20a%20little%20%22incident%22./31786 Veeam Deserialization Vulnerability Veeam released details regarding the latest vulnerablity in Veeam, pointing out the insufficient patch applied to a prior deserialization vulnerability. https://labs.watchtowr.com/by-executive-order-we-are-banning-blacklists-domain-level-rce-in-veeam-backup-replication-cve-2025-23120/ IBM AIX Vulnerablity The AIX NIM service is vulnerable to an unauthenticated remote code execution vulnerability https://www.ibm.com/support/pages/node/7186621 thanks Chris Mosby for Spotify comment
SANS Stormcast Thursday Mar 20th: Cisco Smart Licensing Attacks; Vulnerable Drivers again; Synology Advisories Updated
Exploit Attempts for Cisco Smart Licensing Utility CVE-2024-20439 CVE-2024-20440 Attackers added last September's Cisco Smart Licensing Utility vulnerability to their toolset. These attacks orginate most likely from botnets and the same attackers are scanning for a wide range of additional vulnerabilities. The vulnerability is a static credential issue and trivial to exploit after the credentials were published last fall. https://isc.sans.edu/diary/Exploit%20Attempts%20for%20Cisco%20Smart%20Licensing%20Utility%20CVE-2024-20439%20and%20CVE-2024-20440/31782 Legacy Driver Exploitation Through Bypassing Certificate Verification Ahnlab documented a new type of "bring your own vulnerable driver" vulnerability. In this case, an old driver used by an anit-malware and anti-rootkit system can be used to shut down arbitrary processeses, including security related processeses. https://asec.ahnlab.com/en/86881/ Synology Vulnerability Updates Synology updates some security advisories it release last year adding addition details and vulnerable systems. https://www.synology.com/en-global/security/advisory/Synology_SA_24_20 https://www.synology.com/en-global/security/advisory/Synology_SA_24_24
SANS Stormcast Wednesday Mar 19th 2025: Python DLL Side Loading; Tomcast RCE Correction; SAML Roulette; Windows Shortcut 0-Day
Python Bot Delivered Through DLL Side-Loading A "normal", but vulnerable to DLL side-loading PDF reader may be used to launch additional exploit code https://isc.sans.edu/diary/Python%20Bot%20Delivered%20Through%20DLL%20Side-Loading/31778 Tomcat RCE Correction To exploit the Tomcat RCE I mentioned yesterday, two non-default configuration options must be selected by the victim. https://x.com/dkx02668274/status/1901893656316969308 SAML Roulette: The Hacker Always Wins This Portswigger blog explains in detail how to exploit the ruby-saml vulnerablity against GitLab. https://portswigger.net/research/saml-roulette-the-hacker-always-wins Windows Shortcut Zero Day Exploit Attackers are currently taking advantage of an unpatched vulnerability in how Windows displays Shortcut (.lnk file) details. Trendmicro explains how the attack works and provides PoC code. Microsoft is not planning to fix this issue https://www.trendmicro.com/en_us/research/25/c/windows-shortcut-zero-day-exploit.html
SANS Stormcast Monday Mar 17th 2025: Analyzing GUID Encoded Shellcode; Node.js SAML Vuln; Tomcat RCE in the Wild; CSS e-mail obfuscation
Static Analysis of GUID Encoded Shellcode Didier explains how to decode shell code embeded as GUIDs in malware, and how to feed the result to his tool 1768.py which will extract Cobal Strike configuration information from the code. https://isc.sans.edu/diary/Static%20Analysis%20of%20GUID%20Encoded%20Shellcode/31774 SAMLStorm: Critical Authentication Bypass in xml-crypto and Node.js libraries xml-crypto, a library use in Node.js applications to decode XML and support SAML, has found to parse comments incorrectly leading to several SAML vulnerabilities. https://workos.com/blog/samlstorm One PUT Request to Own Tomcat: CVE-2025-24813 RCE is in the Wild A just made public deserialization vulnerablity in Tomcat is already being exploited. Contributing to the rapid exploit release is the similarity of this vulnerability to other Java deserializtion vulnerabilities. https://lab.wallarm.com/one-put-request-to-own-tomcat-cve-2025-24813-rce-is-in-the-wild/ CVE-2025-24813 CSS Abuse for Evasion and Tracking Attackers are using cascading stylesheets to evade detection and enable more stealthy tracking of users https://blog.talosintelligence.com/css-abuse-for-evasion-and-tracking/
SANS Stormcast Monday March 17th: Mirai Makes Mistakes; Compromised Github Action; ruby-saml vulnerability; Fake GitHub Security Alert Phishing
Mirai Bot Now Incorporating Malformed DrayTek Vigor Router Exploits One of the many versions of the Mirai botnet added some new exploit strings attempting to take advantage of an old DrayTek Vigor Router vulnerability, but they got the URL wrong. https://isc.sans.edu/diary/Mirai%20Bot%20now%20incroporating%20%28malformed%3F%29%20DrayTek%20Vigor%20Router%20Exploits/31770 Compromised GitHub Action The popular GitHub action tj-actions/changed-files was compromised and leaks credentials via the action logs https://www.stepsecurity.io/blog/harden-runner-detection-tj-actions-changed-files-action-is-compromised ruby-saml authentication bypass A confusion in how to parse SAML messages between two XML parsers used by Ruby leads to an authentication bypass in saml-ruby. https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials/ GitHub Fake Security Alerts Fake GitHub security alerts are used to trick package maintainers into adding OAUTH privileges to malicious apps. https://www.bleepingcomputer.com/news/security/fake-security-alert-issues-on-github-use-oauth-app-to-hijack-accounts/
SANS Stormcast: File Hashes in MSFT BI; Apache Camel Vuln; Juniper Fixes Exploited Vuln; AMI Patches 10.0 Redfish BMC Vuln
File Hashes Analysis with Power BI Guy explains in this diary how to analyze Cowrie honeypot file hashes using Microsoft's BI tool and what you may be able to discover using this tool. https://isc.sans.edu/diary/File%20Hashes%20Analysis%20with%20Power%20BI%20from%20Data%20Stored%20in%20DShield%20SIEM/31764 Apache Camel Vulnerability Apache released two patches for Camel in close succession. Initially, the vulnerability was only addressed for headers, but as Akamai discovered, it can also be exploited via query parameters. This vulnerability is trivial to exploit and leads to arbitrary code execution. https://www.akamai.com/blog/security-research/march-apache-camel-vulnerability-detections-and-mitigations Juniper Patches Junos Vulnerability Juniper patches an already exploited vulnerability in JunOS. However, to exploit the vulnerability, and attacker already needs privileged access. By exploiting the vulnerability, an attacker may completely compromised the device. https://supportportal.juniper.net/s/article/2025-03-Out-of-Cycle-Security-Bulletin-Junos-OS-A-local-attacker-with-shell-access-can-execute-arbitrary-code-CVE-2025-21590?language=en_US AMI Security Advisory AMI patched three vulnerabilities. One of the, an authentication bypass in Redfish, allows for a complete system compromise without authentication and is rated with a CVSS score of 10.0. https://go.ami.com/hubfs/Security%20Advisories/2025/AMI-SA-2025003.pdf
SANS Stormcast Thursday Mar 13th: Exploiting Login Pages with Log4j; Patch Tuesday Fallout; Adobe Patches; Medusa Ransomware; Zoom and Font Library Updates;
Log4J Scans for VMWare Hyhbrid Cloud Extensions An attacker is scanning various login pages, including the authentication feature in the VMWare HCX REST API for Log4j vulnerabilities. The attack submits the exploit string as username, hoping to trigger the vulnerability as Log4j logs the username https://isc.sans.edu/diary/Scans%20for%20VMWare%20Hybrid%20Cloud%20Extension%20%28HCX%29%20API%20(Log4j%20-%20not%20brute%20forcing)/31762 Patch Tuesday Fallout Yesterday's Apple patch may re-activate Apple Intelligence for users who earlier disabled it. Microsoft is offering support for users whos USB printers started printing giberish after a January patch was applies. https://www.macrumors.com/2025/03/11/ios-18-3-2-apple-intelligence-auto-on/ https://learn.microsoft.com/en-us/windows/release-health/status-windows-10-22h2#usb-printers-might-print-random-text-with-the-january-2025-preview-update Adobe Updates Adobe updated seven different products, including Adobe Acrobat. The Acrobat vulnerability may lead to remote code execution and Adobe considers the vulnerablities critical. https://helpx.adobe.com/security/security-bulletin.html Medusa Ransomware CISA and partner agencies released details about the Medusa Ransomware. The document includes many details useful to defenders. https://www.cisa.gov/news-events/cybersecurity-advisories/aa25-071a Zoom Update Zoom released a critical update fixing a number of remote code execution vulnerabilities. https://www.zoom.com/en/trust/security-bulletin/ FreeType Library Vulnerability https://www.facebook.com/security/advisories/cve-2025-27363
SANS Stormcast Wednesday Mar 12th: Microsoft Patch Tuesday; Apple Patch; Espressif ESP32 Statement
Microsoft Patch Tuesday Microsoft Patched six already exploited vulnerabilities today. In addition, the patches included a critical patch for Microsoft's DNS server and about 50 additional patches. https://isc.sans.edu/diary/Microsoft%20Patch%20Tuesday%3A%20March%202025/31756 Apple Updates iOS/macOS Apple released an update to address a single, already exploited, vulnerability in WebKit. This vulnerability affects iOS, macOS and VisionOS. https://support.apple.com/en-us/100100 Expressif Response to ESP32 Debug Commands Expressif released a statement commenting on the recent release of a paper alledging "Backdoors" in ESP32 chipsets. According to Expressif, these commands are debug commands and not reachable directly via Bluetooth. https://www.espressif.com/en/news/Response_ESP32_Bluetooth
SANS Stormcast Tuesday Mar 11th: Shellcode as UUIDs; Moxe Switch Vuln Updates; Opentext Vuln; Livewire Volt Vuln;
Shellcode Encoded in UUIDs Attackers are using UUIDs to encode Shellcode. The 128 Bit (or 16 Bytes) encoded in each UUID are converted to shell code to implement a cobalt strike beacon https://isc.sans.edu/diary/Shellcode%20Encoded%20in%20UUIDs/31752 Moxa CVE-2024-12297 Expanded to PT Switches Moxa in January first releast an update to address a fronted authorizaation logic disclosure vulnerability. It now updated the advisory and included the PT series switches as vulenrable. https://www.moxa.com/en/support/product-support/security-advisory/mpsa-241408-cve-2024-12297-frontend-authorization-logic-disclosure-vulnerability-identified-in-pt-switches Opentext Insufficently Protected Credentials https://portal.microfocus.com/s/article/KM000037455?language=en_US Livewire Volt API vulnerability https://github.com/livewire/volt/security/advisories/GHSA-v69f-5jxm-hwvv
SANS Stormcast: Webshells; Undocumented ESP32 Commands; Camera Used For Ransomware Distribution
Commonly Probed Webshell URLs Many attackers deploy web shells to gain a foothold on vulnerable web servers. These webshells can also be taken over by parasitic exploits. https://isc.sans.edu/diary/Commonly%20Probed%20Webshell%20URLs/31748 Undocumented ESP32 Commands A recent conference presentation by Tarlogic revealed several "backdoors" or undocumented features in the commonly used ESP32 Chipsets. Tarlogic also released a toolkit to make it easier to audit chipsets and find these hiddent commands. https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices/ Camera Off: Akira deploys ransomware via Webcam The Akira ransomware group was recently observed infecting a network with Ransomware by taking advantage of a webcam. https://www.s-rminform.com/latest-thinking/camera-off-akira-deploys-ransomware-via-webcam
SANS Stormcast Friday Mar 7th: Chrome vs Extensions; Kibana Update; PrePw0n3d Android TV Sticks; Identifying APTs (@sans_edu, Eric LeBlanc)
Latest Google Chrome Update Encourages UBlock Origin Removal The latest update to Google Chrome not only disabled the UBlock Origin ad blocker, but also guides users to uninstall the extension instead of re-enabling it. https://chromereleases.googleblog.com/2025/03/stable-channel-update-for-desktop.html https://www.reddit.com/r/youtube/comments/1j2ec76/ublock_origin_is_gone/ Critical Kibana Update Elastic published a critical Kibana update patching a prototype polution vulnerability that would allow arbitrary code execution for users with the "Viewer" role. https://discuss.elastic.co/t/kibana-8-17-3-security-update-esa-2025-06/375441 Certified PrePw0n3d Android TV Sticks Wired is reporting of over a million Android TV sticks that were found to be pre-infected with adware https://www.wired.com/story/android-tv-streaming-boxes-china-backdoor/ SANS.edu Research Paper Advanced Persistent Threats (APTs) are among the most challenging to detect in enterprise environments, often mimicking authorized privileged access prior to their actions on objectives. https://www.sans.edu/cyber-research/identifying-advanced-persistent-threat-activity-through-threat-informed-detection-engineering-enhancing-alert-visibility-enterprises/
SANS Stormcast Thursday Mar 6th: DShield ELK Analysis; Jailbreaking AMD CPUs; VIM Vulnerability; Snail Mail Ransomware
DShield Traffic Analysis using ELK The "DShield SIEM" includes an ELK dashboard as part of the Honeypot. Learn how to find traffic of interest with this tool. https://isc.sans.edu/diary/DShield%20Traffic%20Analysis%20using%20ELK/31742 Zen and the Art of Microcode Hacking Google released details, including a proof of concept exploit, showing how to take advantage of the recently patched AMD microcode vulnerability https://bughunters.google.com/blog/5424842357473280/zen-and-the-art-of-microcode-hacking CVE-2024-56161 VIM Vulnerability An attacker may execute arbitrary code by tricking a user to open a crafted tar file in VIM https://github.com/vim/vim/security/advisories/GHSA-wfmf-8626-q3r3 Snil Mail Fake Ransom Note A copy cat group is impersonating ransomware actors. The group sends snail mail to company executives claiming to have stolen company data and threatening to leak it unless a payment is made. https://www.guidepointsecurity.com/blog/snail-mail-fail-fake-ransom-note-campaign-preys-on-fear/