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Category — hacking Linux servers
Capital One Fined $80 Million for 2019 Data Breach Affecting 106 Million Users

Capital One Fined $80 Million for 2019 Data Breach Affecting 106 Million Users

Aug 07, 2020
A United States regulator has fined the credit card provider Capital One Financial Corp with $80 million over last year's data breach that exposed the personal information of more than 100 million credit card applicants of Americans. The fine was imposed by the Office of the Comptroller of the Currency (OCC), an independent bureau within the United States Department of the Treasury that governs the execution of laws relating to national banks. According to a press release published by the OCC on Thursday, Capital One failed to establish appropriate risk management before migrating its IT operations to a public cloud-based service, which included appropriate design and implementation of certain network security controls, adequate data loss prevention controls, and effective dispositioning of alerts. The OCC also said that the credit card provider also left numerous weaknesses in its cloud-based data storage in an internal audit in 2015 as well as failed to patch security
Hackers Planted Backdoor in Webmin, Popular Utility for Linux/Unix Servers

Hackers Planted Backdoor in Webmin, Popular Utility for Linux/Unix Servers

Aug 20, 2019
Following the public disclosure of a critical zero-day vulnerability in Webmin last week, the project's maintainers today revealed that the flaw was not actually the result of a coding mistake made by the programmers. Instead, it was secretly planted by an unknown hacker who successfully managed to inject a backdoor at some point in its build infrastructure—that surprisingly persisted into various releases of Webmin (1.882 through 1.921) and eventually remained hidden for over a year. With over 3 million downloads per year, Webmin is one of the world's most popular open-source web-based applications for managing Unix-based systems, such as Linux, FreeBSD, or OpenBSD servers. Webmin offers a simple user interface (UI) to manage users and groups, databases, BIND, Apache, Postfix, Sendmail, QMail, backups, firewalls, monitoring and alerts, and much more. The story started when Turkish researcher Özkan Mustafa Akkuş publicly presented a zero-day remote code execution vul
Cyber Story Time: The Boy Who Cried "Secure!"

Cyber Story Time: The Boy Who Cried "Secure!"

Nov 21, 2024Threat Detection / Pentesting
As a relatively new security category, many security operators and executives I've met have asked us "What are these Automated Security Validation (ASV) tools?" We've covered that pretty extensively in the past, so today, instead of covering the " What is ASV?" I wanted to address the " Why ASV?" question. In this article, we'll cover some common use cases and misconceptions of how people misuse and misunderstand ASV tools daily (because that's a lot more fun). To kick things off, there's no place to start like the beginning. Automated security validation tools are designed to provide continuous, real-time assessment of an organization's cybersecurity defenses. These tools are continuous and use exploitation to validate defenses like EDR, NDR, and WAFs. They're more in-depth than vulnerability scanners because they use tactics and techniques that you'll see in manual penetration tests. Vulnerability scanners won't relay hashes or combine vulnerabilities to further attacks, whic
LibSSH Flaw Allows Hackers to Take Over Servers Without Password

LibSSH Flaw Allows Hackers to Take Over Servers Without Password

Oct 17, 2018
A four-year-old severe vulnerability has been discovered in the Secure Shell (SSH) implementation library known as Libssh that could allow anyone to completely bypass authentication and gain unfettered administrative control over a vulnerable server without requiring a password. The security vulnerability, tracked as CVE-2018-10933 , is an authentication-bypass issue that was introduced in Libssh version 0.6 released earlier 2014, leaving thousands of enterprise servers open to hackers for the last four years. But before you get frightened, you should know that neither the widely used OpenSSH nor Github's implementation of libssh was affected by the vulnerability. The vulnerability resides due to a coding error in Libssh and is "ridiculously simple" to exploit. According to a security advisory published Tuesday, all an attacker needs to do is sending an "SSH2_MSG_USERAUTH_SUCCESS" message to a server with an SSH connection enabled when it expects an &
cyber security

Creating, Managing and Securing Non-Human Identities

websitePermisoCybersecurity / Identity Security
A new class of identities has emerged alongside traditional human users: non-human identities (NHIs). Permiso Security's new eBook details everything you need to know about managing and securing non-human identities, and strategies to unify identity security without compromising agility.
New Linux Kernel Bug Affects Red Hat, CentOS, and Debian Distributions

New Linux Kernel Bug Affects Red Hat, CentOS, and Debian Distributions

Sep 26, 2018
Security researchers have published the details and proof-of-concept (PoC) exploits of an integer overflow vulnerability in the Linux kernel that could allow an unprivileged user to gain superuser access to the targeted system. The vulnerability, discovered by cloud-based security and compliance solutions provider Qualys, which has been dubbed "Mutagen Astronomy," affects the kernel versions released between July 2007 and July 2017, impacting the Red Hat Enterprise Linux, CentOS, and Debian distributions. The Mutagen Astronomy vulnerability tracked as CVE-2018-14634, is a type of a local privilege escalation issue—one of the most common issues with operating systems as a whole—and exists in the Linux kernel's create_elf_tables() function that operates the memory tables. To successfully exploit this vulnerability, attackers need to have access to the targeted system and run their exploit that leads to a buffer overflow, thereby resulting in the execution of malici
7-Year-Old Samba Flaw Lets Hackers Access Thousands of Linux PCs Remotely

7-Year-Old Samba Flaw Lets Hackers Access Thousands of Linux PCs Remotely

May 25, 2017
A 7-year-old critical remote code execution vulnerability has been discovered in Samba networking software that could allow a remote attacker to take control of an affected Linux and Unix machines. Samba is open-source software (re-implementation of SMB networking protocol) that runs on the majority of operating systems available today, including Windows, Linux, UNIX, IBM System 390, and OpenVMS. Samba allows non-Windows operating systems, like GNU/Linux or Mac OS X, to share network shared folders, files, and printers with Windows operating system. The newly discovered remote code execution vulnerability ( CVE-2017-7494 ) affects all versions newer than Samba 3.5.0 that was released on March 1, 2010. "All versions of Samba from 3.5.0 onwards are vulnerable to a remote code execution vulnerability, allowing a malicious client to upload a shared library to a writable share, and then cause the server to load and execute it," Samba wrote in an advisory published Wed
Hacker Who Used Linux Botnet to Send Millions of Spam Emails Pleads Guilty

Hacker Who Used Linux Botnet to Send Millions of Spam Emails Pleads Guilty

Mar 29, 2017
A Russian man accused of infecting tens of thousands of computer servers worldwide to generate millions in illicit profit has finally entered a guilty plea in the United States and is going to face sentencing in August. Maxim Senakh, 41, of Velikii Novgorod, Russia, pleaded guilty in a US federal court on Tuesday for his role in the development and maintenance of the infamous Linux botnet known as Ebury that siphoned millions of dollars from victims worldwide. Senakh, who was detained by Finland in August 2015 and extradition to the US in January 2016, admitted to installing Ebury malware on computer servers worldwide, including thousands in the United States. First spotted in 2011, Ebury is an SSH backdoor Trojan for Linux and Unix-style operating systems, like FreeBSD or Solaris, which infected more than 500,000 computers and 25,000 dedicated servers in a worldwide malware campaign called ' Operation Windigo .' Ebury backdoor gives attackers full shell control of
New Trojan Turns Thousands Of Linux Devices Into Proxy Servers

New Trojan Turns Thousands Of Linux Devices Into Proxy Servers

Jan 25, 2017
" Linux doesn't get viruses " — It's a Myth. A new Trojan has been discovered in the wild that turns Linux-based devices into proxy servers, which attackers use to protect their identity while launching cyber attacks from the hijacked systems. Dubbed Linux.Proxy.10 , the Trojan was first spotted at the end of last year by the researchers from Russian security firm Doctor Web, who later identified thousand of compromised machines by the end of January this year and the campaign is still ongoing and hunting for more Linux machines. According to researchers, the malware itself doesn't include any exploitation module to hack into Linux machines; instead, the attackers are using other Trojans and techniques to compromise devices at the first place and then create a new backdoor login account using the username as " mother " and password as " fucker ." Once backdoored and the attacker gets the list of all successfully compromised Linux ma
Linux Ransomware targeting Servers and Threatening Webmasters to Pay

Linux Ransomware targeting Servers and Threatening Webmasters to Pay

Nov 09, 2015
Since past few years, Ransomware has emerged as one of the catastrophic malware programs that lets hacker encrypts all the contents of a victim's hard drive or/and server and demands ransom (typically to be paid in Bitcoin ) in exchange for a key to decrypt it. Until now cyber criminals were targeting computers, smartphones and tablets, but now it appears they are creating ransomware that makes the same impact but for Web Sites – specifically holding files, pages and images of the target website for Ransom. Dubbed Linux.Encoder.1 by Russian antivirus firm Dr.Web , the new strain of ransomware targets Linux-powered websites and servers by encrypting MySQL, Apache, and home/root folders associated with the target site and asking for 1 Bitcoin ( ~ $300 ) to decrypt the files. The ransomware threat is delivered to the target website through known vulnerabilities in website plugins or third-party software. Must Read: FBI Suggests Ransomware Victims — 'Just Pay th
Hackers Using 'Shellshock' Bash Vulnerability to Launch Botnet Attacks

Hackers Using 'Shellshock' Bash Vulnerability to Launch Botnet Attacks

Sep 27, 2014
Researchers on Thursday discovered a critical remotely exploitable vulnerability in the widely used command-line shell GNU Bourne Again Shell ( Bash ), dubbed " Shellshock " which affects most of the Linux distributions and servers worldwide, and may already have been exploited in the wild to take over Web servers as part of a botnet that is currently trying to infect other servers as well. BOTNET ATTACK IN THE WILD The bot was discovered by the security researcher with the Twitter handle @yinettesys , who reported it on Github and said it appeared to be remotely controlled by miscreants, which indicates that the vulnerability is already being used maliciously by the hackers. The vulnerability (CVE-2014-6271) , which came to light on Wednesday, affects versions 1.14 through 4.3 of GNU Bash and could become a dangerous threat to Linux/Unix and Apple users if the patches to BASH are not applied to the operating systems. However, the patches for the vulnerabil
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