Catégorie : Sécurité

Microsoft today released fixes to plug at least 55 security holes in its Windows operating systems and other software. Four of these weaknesses can be exploited by malware and malcontents to seize complete, remote control over vulnerable systems without any help from users. On deck this month are patches to quash a wormable flaw, a creepy wireless bug, and yet another reason to call for the death of Microsoft’s Internet Explorer (IE) web browser. While May brings about half the normal volume of updates from Microsoft, there are some notable weaknesses that deserve prompt attention, particularly from enterprises. By all accounts, the most pressing priority this month is CVE-2021-31166, a Windows 10 and Windows Server flaw which allows an unauthenticated attacker to remotely execute malicious code at the operating system…

Posted by Ivan Lozano, Android TeamThe Android team has been working on introducing the Rust programming language into the Android Open Source Project (AOSP) since 2019 as a memory-safe alternative for platform native code development. As with any large project, introducing a new language requires careful consideration. For Android, one important area was assessing how to best fit Rust into Android’s build system. Currently this means the Soong build system (where the Rust support resides), but these design decisions and considerations are equally applicable for Bazel when AOSP migrates to that build system. This post discusses some of the key design considerations and resulting decisions we made in integrating Rust support into Android’s build system. Rust integration into large projects A RustConf 2019 meeting on Rust usage within large organizations…

The FBI confirmed this week that a relatively new ransomware group known as DarkSide is responsible for an attack that caused Colonial Pipeline to shut down 5,550 miles of pipe, stranding countless barrels of gasoline, diesel and jet fuel on the Gulf Coast. Here’s a closer look at the DarkSide cybercrime gang, as seen through their negotiations with a recent U.S. victim that earns $15 billion in annual revenue. Colonial Pipeline has shut down 5,500 miles of fuel pipe in response to a ransomware incident. Image: colpipe.com New York City-based cyber intelligence firm Flashpoint said its analysts assess with a moderate-strong degree of confidence that the attack was not intended to damage national infrastructure and was simply associated with a target which had the finances to support a large payment.…

How much is your payroll data worth? Probably a lot more than you think. One financial startup that’s targeting the gig worker market is offering up to $500 to anyone willing to hand over the payroll account username and password given to them by their employer, plus a regular payment for each month afterwards in which those credentials still work. This ad, from workplaceunited[.]com, promised up to $500 for people who provided their payroll passwords, plus $25 a month for each month those credentials kept working. New York-based Argyle.com says it’s building a platform where people who work multiple jobs and/or side hustles can improve their credit and employment options by pooling all of their gig work data in one place. “Consumers’ access to financial security and upward mobility is…

John Bernard, a pseudonym used by a convicted thief and con artist named John Clifton Davies who’s fleeced dozens of technology startups out of an estimated $30 million, appears to have reinvented himself again after being exposed in a recent investigative series published here. Sources tell KrebsOnSecurity that Davies/Bernard is now posing as John Cavendish and head of a new “private office” called Hempton Business Management LLP. John Davies is a U.K. man who absconded from justice before being convicted on multiple counts of fraud in 2015. Prior to his conviction, Davies served 16 months in jail before being cleared of murdering his wife on their honeymoon in India. Davies’ fraud convictions stemmed from a series of U.K. companies he set up supposedly to help troubled companies reorganize their debt…

Posted by Priya Wadhwa, Jake Sanders, Google Open Source Security TeamWith over 16 million pulls per month, Google’s `distroless` base images are widely used and depended on by large projects like Kubernetes and Istio. These minimal images don’t include common tools like shells or package managers, making their attack surface (and download size!) smaller than traditional base images such as `ubuntu` or `alpine`. Even with this additional protection, users could still fall prey to typosquatting attacks, or receive a malicious image if the distroless build process was compromised – making users vulnerable to accidentally using a malicious image instead of the actual distroless image. This problem isn’t unique to distroless images – until now, there just hasn’t been an easy way to verify that images are what they claim to…

Phishers targeting Microsoft Office 365 users increasingly are turning to specialized links that take users to their organization’s own email login page. After a user logs in, the link prompts them to install a malicious but innocuously-named app that gives the attacker persistent, password-free access to any of the user’s emails and files, both of which are then plundered to launch malware and phishing scams against others. These attacks begin with an emailed link that when clicked loads not a phishing site but the user’s actual Office 365 login page — whether that be at microsoft.com or their employer’s domain. After logging in, the user might see a prompt that looks something like this: These malicious apps allow attackers to bypass multi-factor authentication, because they are approved by the user…

Alex Gough, Engineer, Chrome Platform Security TeamChrome 90 for Windows adopts Hardware-enforced Stack Protection, a mitigation technology to make the exploitation of security bugs more difficult for attackers. This is supported by Windows 20H1 (December Update) or later, running on processors with Control-flow Enforcement Technology (CET) such as Intel 11th Gen or AMD Zen 3 CPUs. With this mitigation the processor maintains a new, protected, stack of valid return addresses (a shadow stack). This improves security by making exploits more difficult to write. However, it may affect stability if software that loads itself into Chrome is not compatible with the mitigation. Below we describe some exploitation techniques that are mitigated by stack protection, discuss its limitations and what we will do next to approach them. Finally, we provide some quick…

When normal computer users fall into the nasty habit of recycling passwords, the result is most often some type of financial loss. When cybercriminals develop the same habit, it can eventually cost them their freedom. Our passwords can say a lot about us, and much of what they have to say is unflattering. In a world in which all databases — including hacker forums — are eventually compromised and leaked online, it can be tough for cybercriminals to maintain their anonymity if they’re in the habit of re-using the same unusual passwords across multiple accounts associated with different email addresses. The long-running Breadcrumbs series here tracks how cybercriminals get caught, and it’s mostly through odd connections between their online and offline selves scattered across the Internet. Interestingly, one of the…

Some of the world’s top tech firms are backing a new industry task force focused on disrupting cybercriminal ransomware gangs by limiting their ability to get paid, and targeting the individuals and finances of the organized thieves behind these crimes. In a 81-page report delivered to the Biden administration this week, top executives from Amazon, Cisco, FireEye, McAfee, Microsoft and dozens of other firms joined the U.S. Department of Justice (DOJ), Europol and the U.K. National Crime Agency in calling for an international coalition to combat ransomware criminals, and for a global network of ransomware investigation hubs. The Ransomware Task Force urged the White House to make finding, frustrating and apprehending ransomware crooks a priority within the U.S. intelligence community, and to designate the current scourge of digital extortion as…