The Hacker News - Cybersecurity News and Analysis: email security

The maintainers of Exim have  released patches  to remediate as many as 21 security vulnerabilities in its software that could enable unauthenticated attackers to achieve complete remote code execution and gain root privileges. Collectively named  '21Nails ,' the flaws include 11 vulnerabilities that require local access to the server and 10 other weaknesses that could be exploited remotely. The issues were discovered by Qualys and reported to Exim on Oct. 20, 2020. "Some of the vulnerabilities can be chained together to obtain a full remote unauthenticated code execution and gain root privileges on the Exim Server," Bharat Jogi, senior manager at Qualys, said in a public disclosure. "Most of the vulnerabilities discovered by the Qualys Research Team for e.g. CVE-2020-28017 affects all versions of Exim going back all the way to 2004." Exim is a popular mail transfer agent (MTA) used on Unix-like operating systems, with over 60% of the publicly reachable

No matter which type of business you are in, whether small, medium, or large, email has become an irrefutable tool for communicating with your employees, partners, and customers. Emails are sent and received each day in bulk by companies from various sources. In addition, organizations may also employ third-party vendors who may be authorized to send emails on behalf of the company. As a result, it becomes increasingly difficult to distinguish between sources that are legitimate and malicious. Here's a solution – PowerDMARC. This SaaS platform helps you assess your  email authentication  protocols from time to time and see if your domain is secure against spoofing with a DMARC record checker, so you can make changes if necessary. Check Your Domain Today!  Use our free tool to examine your domain's DMARC, SPF, DKIM, BIMI, and MTA-STS records instantly to ensure your domain is protected from impersonation and email fraud! Importance of Having Robust Email Security in 2021 S

Email spoofing is a growing problem for an organization's security. Spoofing occurs when a hacker sends an email that appears to have been sent from a trusted source/domain. Email spoofing is not a new concept. Defined as "the forgery of an email address header to make the message appear as if it was sent from a person or location other than the actual sender," it has plagued brands for decades.  When an email is sent, the From address doesn't show which server the email was actually sent from - instead, it shows the domain that was entered when the address was created so as not to arouse suspicion among recipients. With the amount of data flowing through email servers these days, it should come as no surprise that spoofing is a problem for businesses. At the end of 2020, we found that phishing incidents were up a staggering 220% year-over-year at the height of the global pandemic scare. Since not all spoofing attacks are large-scale, the actual number could be muc

Following Microsoft's release of out-of-band patches to address multiple zero-day flaws in on-premises versions of Microsoft Exchange Server, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) has  issued  an emergency directive warning of " active exploitation " of the vulnerabilities. The alert comes on the heels of Microsoft's  disclosure  that China-based hackers were exploiting unknown software bugs in Exchange server to steal sensitive data from select targets, marking the second time in four months that the U.S. has scrambled to address a widespread hacking campaign believed to be the work of foreign threat actors. While the company mainly attributed the campaign to a threat group called HAFNIUM, Slovakian cybersecurity firm ESET  said  it found evidence of CVE-2021-26855 being actively exploited in the wild by several cyber espionage groups, including LuckyMouse, Tick, and Calypso targeting servers located in the U.S., Europe, Asia, and the

An ever-evolving and rampant form of cybercrime that targets emails as the potential medium to conduct fraud is known as Business Email Compromise. Targeting commercial, government as well as non-profit organizations, BEC can lead to huge amounts of data loss, security breach, and compromised financial assets. It is a common misconception that cybercriminals usually lay their focus on MNCs and enterprise-level organizations. SMEs these days are just as much a target to email fraud as the larger industry players. How Can BEC Affect Organizations?  Examples of BEC include sophisticated social engineering attacks like phishing, CEO fraud, fake invoices, and email spoofing, to name a few. It can also be termed an impersonation attack wherein an attacker aims to defraud a company by posing people in authoritarian positions. Impersonating people like the CFO or CEO, a business partner, or anyone you will blindly place your trust in is what drives these attacks' success. February of

In 1982, when SMTP was first specified, it did not contain any mechanism for providing security at the transport level to secure communications between mail transfer agents. Later, in 1999, the STARTTLS command was added to SMTP that in turn supported the encryption of emails in between the servers, providing the ability to convert a non-secure connection into a secure one that is encrypted using TLS protocol. However, encryption is optional in SMTP, which implies that emails can be sent in plaintext.  Mail Transfer Agent-Strict Transport Security (MTA-STS)  is a relatively new standard that enables mail service providers the ability to enforce Transport Layer Security (TLS) to secure SMTP connections and to specify whether the sending SMTP servers should refuse to deliver emails to MX hosts that that does not offer TLS with a reliable server certificate. It has been proven to successfully mitigate TLS downgrade attacks and Man-in-the-Middle (MitM) attacks. SMTP TLS Reporting (TLS-

21st-century technology has allowed Cybercriminals to use sophisticated and undetectable methods for malicious activities. In 2020 alone, a survey revealed that  65% of US-based companies were vulnerable to email phishing and impersonation attacks . This calls for upgrading your organization's security with DMARC, which if not implemented, will enable cyber-attackers to: Instigate money transfers from vulnerable employees via spoofed emails while impersonating senior executives in your company Send fake invoices to your employees and partners Deal in illegal goods via your domain  Spread Ransomware Impersonate customer support to steal confidential customer or partner information Such situations can have long-lasting consequences on your business. From inflicting a blow on thebrand's reputation and credibility among its partners and customer base to loss of valuable company information and millions of dollars, the risks are countless. What is Domain Spoofing? Domain

Cybersecurity researchers have discovered a new critical vulnerability ( CVE-2020-7247 ) in the OpenSMTPD email server that could allow remote attackers to take complete control over BSD and many Linux based servers. OpenSMTPD is an open-source implementation of the server-side SMTP protocol that was initially developed as part of the OpenBSD project but now comes pre-installed on many UNIX-based systems. According to Qualys Research Labs, who discovered this vulnerability, the issue resides in the OpenSMTPD's sender address validation function, called smtp_mailaddr(), which can be exploited to execute arbitrary shell commands with elevated root privileges on a vulnerable server just by sending specially crafted SMTP messages to it. The flaw affects OpenBSD version 6.6 and works against the default configuration for both, the locally enabled interface as well as remotely if the daemon has been enabled to listen on all interfaces and accepts external mail. "Exploit

Imagine receiving an email from US VP Mike Pence's official email account asking for help because he has been stranded in the Philippines. Actually, you don't have to. This actually happened. Pence's email was hacked when he was still the governor of Indiana, and his account was used to attempt to defraud several people. How did this happen? Is it similar to how the DNC server was hacked? Email hacking is one of the most widespread cyber threats at present. It is estimated that around 8 out of 10 people who use the internet have received some form of phishing attack through their emails. Additionally, according to Avanan's 2019 Global Phish Report , 1 in 99 emails is a phishing attack. BitDam is aware of how critical emails are in modern communication. BitDam published a new study on the email threat detection weaknesses of the leading players in email security, and the findings command attention. The research team discovered how Microsoft's Office365

Cybercriminals are busy innovators, adapting their weapons and attack strategies, and ruthlessly roaming the web in search of their next big score. Every manner of sensitive information, such as confidential employee records, customers' financial data, protected medical documents, and government files, are all subject to their relentless threats to cybersecurity . Solutions span a broad spectrum, from training email users to ensuring a VPN kill switch is in place, to adding extensive advanced layers of network protection. To successfully guard against severe threats from hackers, worm viruses to malware, such as botnet attacks, network managers need to use all tools and methods that fit well into a comprehensive cyber defense strategy. Of all the menaces mentioned above to a website owner's peace of mind, botnets arguably present the most unsettling form of security risk. They're not the mere achievements of malicious amateur cybercriminals. They're state

A decade-old botnet malware that currently controls over 450,000 computers worldwide has recently shifted its operations from infecting machines with ransomware or crypto miners to abusing them for sending out sextortion emails to millions of innocent people. Extortion by email is growing significantly, with a large number of users recently complaining about receiving sextortion emails that attempt to extort money from individuals by blackmailing them into exposing their sexual content. Though until now, it wasn't clear how scammers were sending such massive amounts of emails without getting blacklisted by the email providers, security researchers from CheckPoint finally found the missing block in this puzzle. In its latest report shared with The Hacker News prior to the release, Tel Aviv-based security firm CheckPoint reveals that a botnet, called Phorpiex , has recently been updated to include a spam bot designed to use compromised computers as proxies to send out over 3

Cases of document-based malware are steadily rising. 59 percent of all malicious files detected in the first quarter of 2019 were contained in documents. Due to how work is done in today's offices and workplaces, companies are among those commonly affected by file-based attacks. Since small to medium businesses (SMBs) usually lack the kind of security that protects their larger counterparts, they have a greater risk of being affected. Falling victim to file-based malware can cause enormous problems for SMBs. An attack can damage critical data stored in the organization's computers. Such loss can force a company to temporarily halt operations, resulting in financial losses. If a customer's private and financial information is compromised, the company may also face compliance inquiries and lawsuits. Their reputations could also take a hit, discouraging customers from doing business with them. But despite these risks, SMBs still invest very little in cybersecurity