Join me and Metomic CEO Richard Vibert for a discussion about some of the cybersecurity challenges faced by the financial services industry, and how you can best protect your organisations. Sign up now for the free event on February 29 2024.
CVE-2024-21412 was used to evade Microsoft Defender SmartScreen and implant victims with DarkMe
This is a current list of where and when I am scheduled to speak:
I’m speaking at the Munich Security Conference (MSC) 2024 in Munich, Germany, on Friday, February 16, 2024.
I’m giving a keynote at a symposium on “AI and Trust” at Generative AI, Free Speech, & Public Discourse. The symposium will be held at Columbia University in New York City and online, on Tuesday, February 20, 2024.
The list is maintained on this page.
The Minnesota-based Internet provider U.S. Internet Corp. has a business unit called Securence, which specializes in providing filtered, secure email services to businesses, educational institutions and government agencies worldwide. But until it was notified last week, U.S. Internet was publishing more than a decade’s worth of its internal email — and that of thousands of Securence clients — in plain text out on the Internet and just a click away for anyone with a Web browser.
Headquartered in Minnetonka, Minn., U.S. Internet is a regional ISP that provides fiber and wireless Internet service. The ISP’s Securence division bills itself “a leading provider of email filtering and management software that includes email protection and security services for small business, enterprise, educational and government institutions worldwide.”
U.S. Internet/Securence says your email is secure. Nothing could be further from the truth.
Roughly a week ago, KrebsOnSecurity was contacted by Hold Security, a Milwaukee-based cybersecurity firm. Hold Security founder Alex Holden said his researchers had unearthed a public link to a U.S. Internet email server listing more than 6,500 domain names, each with its own clickable link.
A tiny portion of the more than 6,500 customers who trusted U.S. Internet with their email.
Drilling down into those individual domain links revealed inboxes for each employee or user of these exposed websites. Some of the exposed emails dated back to 2008; others were as recent as the present day.
Securence counts among its customers dozens of state and local governments, including: nc.gov — the official website of North Carolina; stillwatermn.gov, the website for the city of Stillwater, Minn.; and cityoffrederickmd.gov, the website for the government of Frederick, Md.
Incredibly, included in this giant index of U.S. Internet customer emails were the internal messages for every current and former employee of U.S. Internet and its subsidiary USI Wireless. Since that index also included the messages of U.S. Internet’s CEO Travis Carter, KrebsOnSecurity forwarded one of Mr. Carter’s own recent emails to him, along with a request to understand how exactly the company managed to screw things up so spectacularly.
Individual inboxes of U.S. Wireless employees were published in clear text on the Internet. The timestamps listed do not appear to be accurate somehow. For example, the timestamp for Mr. Carter’s inbox reads August 2009, but clicking that inbox revealed messages as recent as Feb. 10, 2024.
Within minutes of that notification, U.S. Internet pulled all of the published inboxes offline. Mr. Carter responded and said his team was investigating how it happened. In the same breath, the CEO asked if KrebsOnSecurity does security consulting for hire (I do not).
[Author’s note: Perhaps Mr. Carter was frantically casting about for any expertise he could find in a tough moment. But I found the request personally offensive, because I couldn’t shake the notion that maybe the company was hoping it could buy my silence.]
Earlier this week, Mr. Carter replied with a highly technical explanation that ultimately did little to explain why or how so many internal and customer inboxes were published in plain text on the Internet.
“The feedback from my team was a issue with the Ansible playbook that controls the Nginx configuration for our IMAP servers,” Carter said, noting that this incorrect configuration was put in place by a former employee and never caught. U.S. Internet has not shared how long these messages were exposed.
“The rest of the platform and other backend services are being audited to verify the Ansible playbooks are correct,” Carter said.
Holden said he also discovered that hackers have been abusing a Securence link scrubbing and anti-spam service called Url-Shield to create links that look benign but instead redirect visitors to hacked and malicious websites.
“The bad guys modify the malicious link reporting into redirects to their own malicious sites,” Holden said. “That’s how the bad guys drive traffic to their sites and increase search engine rankings.”
For example, clicking the Securence link shown in the screenshot directly above leads one to a website that tries to trick visitors into allowing site notifications by couching the request as a CAPTCHA request designed to separate humans from bots. After approving the deceptive CAPTCHA/notification request, the link forwards the visitor to a Russian internationalized domain name (рпроаг[.]рф).
The link to this malicious and deceptive website was created using Securence’s link-scrubbing service. Notification pop-ups were blocked when this site tried to disguise a prompt for accepting notifications as a form of CAPTCHA.
U.S. Internet has not responded to questions about how long it has been exposing all of its internal and customer emails, or when the errant configuration changes were made. The company also still has not disclosed the incident on its website. The last press release on the site dates back to March 2020.
KrebsOnSecurity has been writing about data breaches for nearly two decades, but this one easily takes the cake in terms of the level of incompetence needed to make such a huge mistake unnoticed. I’m not sure what the proper response from authorities or regulators should be to this incident, but it’s clear that U.S. Internet should not be allowed to manage anyone’s email unless and until it can demonstrate more transparency, and prove that it has radically revamped its security.
Menlo Security’s latest report also revealed a 26% surge in security policies tailored for generative AI sites
It was discovered that ClamAV incorrectly handled parsing certain OLE2
files. A remote attacker could possibly use this issue to cause ClamAV to
crash, resulting in a denial of service. (CVE-2024-20290)
Amit Schendel discovered that the ClamAV ClamD service incorrectly handled
the VirusEvent feature. An attacker able to connect to ClamD could possibly
use this issue to execute arbitrary code. (CVE-2024-20328)
Iran-aligned adversaries have attempted to use cyber tactics to sway public opinion of the Israel-Hamas war, Google found in a new report
USN-6629-1 fixed vulnerabilities in UltraJSON.
This update provides the corresponding updates for Ubuntu 20.04 LTS.
Original advisory details:
It was discovered that UltraJSON incorrectly handled certain input with
a large amount of indentation. An attacker could possibly use this issue
to crash the program, resulting in a denial of service. (CVE-2021-45958)
Jake Miller discovered that UltraJSON incorrectly decoded certain
characters. An attacker could possibly use this issue to cause key
confusion and overwrite values in dictionaries. (CVE-2022-31116)
It was discovered that UltraJSON incorrectly handled an error when
reallocating a buffer for string decoding. An attacker could possibly
use this issue to corrupt memory. (CVE-2022-31117)
JumpCloud found that 41% of SME IT professionals expect cybersecurity spending to be cut in their organization, increasing the risk of cyber-attacks
The winner of the Best Paper Award at Crypto this year was a significant improvement to lattice-based cryptanalysis.
This is important, because a bunch of NIST’s post-quantum options base their security on lattice problems.
I worry about standardizing on post-quantum algorithms too quickly. We are still learning a lot about the security of these systems, and this paper is an example of that learning.
News story.
