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The Hacker News - Cybersecurity News and Analysis: Vulnerability

Critical SaltStack RCE Bug (CVSS Score 10) Affects Thousands of Data Centers

Critical SaltStack RCE Bug (CVSS Score 10) Affects Thousands of Data Centers

May 01, 2020Ravie Lakshmanan
Two severe security flaws have been discovered in the open-source SaltStack Salt configuration framework that could allow an adversary to execute arbitrary code on remote servers deployed in data centers and cloud environments. The vulnerabilities were identified by F-Secure researchers earlier this March and disclosed on Thursday, a day after SaltStack released a patch (version 3000.2) addressing the issues , rated with CVSS score 10. "The vulnerabilities, allocated CVE IDs CVE-2020-11651 and CVE-2020-11652 , are of two different classes," the cybersecurity firm said . "One being authentication bypass where functionality was unintentionally exposed to unauthenticated network clients, the other being directory traversal where untrusted input (i.e., parameters in network requests) was not sanitized correctly allowing unconstrained access to the entire filesystem of the master server." The researchers warned that the flaws could be exploited in the wild imm
CISA Warns Patched Pulse Secure VPNs Could Still Expose Organizations to Hackers

CISA Warns Patched Pulse Secure VPNs Could Still Expose Organizations to Hackers

April 17, 2020Ravie Lakshmanan
The United States Cybersecurity and Infrastructure Security Agency (CISA) yesterday issued a fresh advisory alerting organizations to change all their Active Directory credentials as a defense against cyberattacks trying to leverage a known remote code execution (RCE) vulnerability in Pulse Secure VPN servers—even if they have already patched it. The warning comes three months after another CISA alert urging users and administrators to patch Pulse Secure VPN environments to thwart attacks exploiting the vulnerability. "Threat actors who successfully exploited CVE-2019-11510 and stole a victim organization's credentials will still be able to access — and move laterally through — that organization's network after the organization has patched this vulnerability if the organization did not change those stolen credentials," CISA said. CISA has also released a tool to help network administrators look for any indicators of compromise associated with the flaw.
Critical RCE Bug Affects Millions of OpenWrt-based Network Devices

Critical RCE Bug Affects Millions of OpenWrt-based Network Devices

March 24, 2020Mohit Kumar
A cybersecurity researcher today disclosed technical details and proof-of-concept of a critical remote code execution vulnerability affecting OpenWrt , a widely used Linux-based operating system for routers, residential gateways, and other embedded devices that route network traffic. Tracked as CVE-2020-7982 , the vulnerability resides in the OPKG package manager of OpenWrt that exists in the way it performs integrity checking of downloaded packages using the SHA-256 checksums embedded in the signed repository index. While an 'opkg install' command is invoked on the victim system, the flaw could allow a remote man-in-the-middle attacker in a position to intercept the communication of a targeted device to execute arbitrary code by tricking the system into installing a malicious package or software update without verification. If exploited successfully, a remote attacker could gain complete control over the targeted OpenWrt network device, and subsequently, over the netwo
Mukashi: A New Mirai IoT Botnet Variant Targeting Zyxel NAS Devices

Mukashi: A New Mirai IoT Botnet Variant Targeting Zyxel NAS Devices

March 21, 2020Ravie Lakshmanan
A new version of the infamous Mirai botnet is exploiting a recently uncovered critical vulnerability in network-attached storage (NAS) devices in an attempt to remotely infect and control vulnerable machines. Called " Mukashi ," the new variant of the malware employs brute-force attacks using different combinations of default credentials to log into Zyxel NAS, UTM, ATP, and VPN firewall products to take control of the devices and add them to a network of infected bots that can be used to carry out Distributed Denial of Service (DDoS) attacks. Multiple Zyxel NAS products running firmware versions up to 5.21 are vulnerable to the compromise, Palo Alto Networks' Unit 42 global threat intelligence team said, adding they uncovered the first such exploitation of the flaw in the wild on March 12. Zyxel's Pre-Authentication Command Injection Flaw Mukashi hinges on a pre-authentication command injection vulnerability (tracked as CVE-2020-9054 ), for which a proof-
Adobe Releases Critical Patches for Acrobat Reader, Photoshop, Bridge, ColdFusion

Adobe Releases Critical Patches for Acrobat Reader, Photoshop, Bridge, ColdFusion

March 18, 2020Mohit Kumar
Though it's not Patch Tuesday, Adobe today released a massive batch of out-of-band software updates for six of its products to patch a total of 41 new security vulnerabilities. Adobe last week made a pre-announcement to inform its users of an upcoming security update for Acrobat and Reader, but the company today unveiled bugs in a total of 6 widely-used software, including: Adobe Genuine Integrity Service Adobe Acrobat and Reader Adobe Photoshop Adobe Experience Manager Adobe ColdFusion Adobe Bridge According to the security advisories, 29 of the 41 vulnerabilities are critical in severity, and the other 11 have been rated important. Adobe Acrobat and Reader software for Windows and macOS systems contain 13 flaws, out of which 9 are critical. Adobe Genuine Integrity Service , a utility in Adobe suite that prevents users from running non-genuine or cracked pirated software, is affected with just one important severity privilege escalation flaw. Adobe Photoshop
Poor Rowhammer Fixes On DDR4 DRAM Chips Re-Enable Bit Flipping Attacks

Poor Rowhammer Fixes On DDR4 DRAM Chips Re-Enable Bit Flipping Attacks

March 10, 2020Mohit Kumar
Remember rowhammer vulnerability? A critical issue affecting modern DRAM (dynamic random access memory) chips that could allow attackers to obtain higher kernel privileges on a targeted system by repeatedly accessing memory cells and induce bit flips. To mitigate Rowhammer vulnerability on the latest DDR4 DRAM, many memory chip manufacturers added some defenses under the umbrella term Target Row Refresh (TRR) that refreshes adjacent rows when a victim row is accessed more than a threshold. But it turns out 'Target Row Refresh,' promoted as a silver bullet to mitigate rowhammer attacks, is also insufficient and could let attackers execute new hammering patterns and re-enable the bit-flip attacks on the latest hardware as well. TRRespass: The Rowhammer Fuzzing Tool Tracked as CVE-2020-10255 , the newly reported vulnerability was discovered by researchers at VUSec Lab, who today also released ' TRRespass ,' an open source black box many-sided RowHammer fuzzin
LVI Attacks: New Intel CPU Vulnerability Puts Data Centers At Risk

LVI Attacks: New Intel CPU Vulnerability Puts Data Centers At Risk

March 10, 2020Mohit Kumar
It appears there is no end in sight to the hardware level security vulnerabilities in Intel processors, as well as to the endless 'performance killing' patches that resolve them. Modern Intel CPUs have now been found vulnerable to a new attack that involves reversely exploiting Meltdown-type data leak vulnerabilities to bypass existing defenses, two separate teams of researchers told The Hacker News. Tracked as CVE-2020-0551 , dubbed " Load Value Injection in the Line Fill Buffers" or LVI-LFB for short, the new speculative-execution attack could let a less privileged attacker steal sensitive information—encryption keys or passwords—from the protected memory and subsequently, take significant control over a targeted system. According to experts at Bitdefender and academic researchers from a couple of universities, the new attack is particularly devastating in multi-tenant environments such as enterprise workstations or cloud servers in the datacenter. And
Install Latest Chrome Update to Patch 0-Day Bug Under Active Attacks

Install Latest Chrome Update to Patch 0-Day Bug Under Active Attacks

February 25, 2020Ravie Lakshmanan
Google yesterday released a new critical software update for its Chrome web browser for desktops that will be rolled out to Windows, Mac, and Linux users over the next few days. The latest Chrome 80.0.3987.122 includes security fixes for three new vulnerabilities , all of which have been marked 'HIGH' in severity, including one that (CVE-2020-6418) has been reportedly exploited in the wild. The brief description of the Chrome bugs, which impose a significant risk to your systems if left unpatched, are as follows: Integer overflow in ICU — Reported by André Bargull on 2020-01-22 Out of bounds memory access in streams (CVE-2020-6407) — Reported by Sergei Glazunov of Google Project Zero on 2020-01-27 Type confusion in V8 (CVE-2020-6418) — Reported by Clement Lecigne of Google's Threat Analysis Group on 2020-02-18 The Integer Overflow vulnerability was disclosed by André Bargull privately to Google last month, earning him $5,000 in rewards, while the other two
New OpenSMTPD RCE Flaw Affects Linux and OpenBSD Email Servers

New OpenSMTPD RCE Flaw Affects Linux and OpenBSD Email Servers

February 25, 2020Mohit Kumar
OpenSMTPD has been found vulnerable to yet another critical vulnerability that could allow remote attackers to take complete control over email servers running BSD or Linux operating systems. OpenSMTPD , also known as OpenBSD SMTP Server, is an open-source implementation of the Simple Mail Transfer Protocol (SMTP) to deliver messages on a local machine or to relay them to other SMTP servers. It was initially developed as part of the OpenBSD project but now comes pre-installed on many UNIX-based systems. Discovered by experts at Qualys Research Labs, who also reported a similar RCE flaw in the email server application last month, the latest out-of-bounds read issue, tracked as  CVE-2020-8794 , resides in a component of the OpenSMTPD's client-side code that was introduced nearly 5 years ago. Just like the previous issue, which attackers started exploiting in the wild just a day after its public disclosure, the new OpenSMTPD flaw could also let remote hackers execute arbit
Critical Bug in WordPress Theme Plugin Opens 200,000 Sites to Hackers

Critical Bug in WordPress Theme Plugin Opens 200,000 Sites to Hackers

February 17, 2020Swati Khandelwal
A popular WordPress theme plugin with over 200,000 active installations contains a severe but easy-to-exploit software vulnerability that, if left unpatched, could let unauthenticated remote attackers compromise a wide range of websites and blogs. The vulnerable plugin in question is ' ThemeGrill Demo Importer ' that comes with free as well as premium themes sold by the software development company ThemeGrill. ThemeGrill Demo Importer plugin has been designed to allow WordPress site admins to import demo content, widgets, and settings from ThemeGrill, making it easier for them to quickly customize the theme. According to a report WebARX security company shared with The Hacker News, when a ThemeGrill theme is installed and activated, the affected plugin executes some functions with administrative privileges without checking whether the user running the code is authenticated and is an admin. The flaw could eventually allow unauthenticated remote attackers to wipe the e
A Dozen Vulnerabilities Affect Millions of Bluetooth LE Powered Devices

A Dozen Vulnerabilities Affect Millions of Bluetooth LE Powered Devices

February 17, 2020Wang Wei
A team of cybersecurity researchers late last week disclosed the existence of 12 potentially severe security vulnerabilities, collectively named ' SweynTooth ,' affecting millions of Bluetooth-enabled wireless smart devices worldwide—and worryingly, a few of which haven't yet been patched. All SweynTooth flaws basically reside in the way software development kits (SDKs) used by multiple system-on-a-chip (SoC) have implemented Bluetooth Low Energy (BLE) wireless communication technology—powering at least 480 distinct products from several vendors including Samsung, FitBit and Xiaomi. According to the researchers, hackers in close physical proximity to vulnerable devices can abuse this vulnerability to remotely trigger deadlocks, crashes, and even bypass security in BLE products, allowing them to arbitrary read or write access to device's functions that are otherwise only allowed to be accessed by an authorized user. "As of today, SweynTooth vulnerabilities a
The Rise of the Open Bug Bounty Project

The Rise of the Open Bug Bounty Project

February 06, 2020The Hacker News
Can you imagine launching a global bug bounty platform with almost 500,000 submissions and 13,000 researchers without consuming a cent from venture capitalists? If not, this success story is for you. The once skyrocketing bug bounty industry seems to be not in the best shape today. While prominent security researchers are talking about a growing multitude of hurdles they experience with the leading commercial bug bounty platforms, the latter are trying to reinvent themselves as "next-generation penetration testing" or similar services. You be the judge of how successful they will be. Generous venture funds have poured many millions into rapidly spending bug bounty startups that have not replaced Managed Penetration Testing (MPT) services (as some declared). However, these startups have positively improved the price/quality ratio of pen testing services on the global market. Amid the uncertainty for the future of commercial bug bounty platforms, the not-for-profit Op
5 High Impact Flaws Affect Cisco Routers, Switches, IP Phones and Cameras

5 High Impact Flaws Affect Cisco Routers, Switches, IP Phones and Cameras

February 05, 2020Swati Khandelwal
Several Cisco-manufactured network equipments have been found vulnerable to five new security vulnerabilities that could allow hackers to take complete control over them, and subsequently, over the enterprise networks they power. Four of the five high-severity bugs are remote code execution issues affecting Cisco routers, switches, and IP cameras, whereas the fifth vulnerability is a denial-of-service issue affecting Cisco IP phones. Collectively dubbed ' CDPwn ,' the reported vulnerabilities reside in the various implementations of the Cisco Discovery Protocol (CDP) that comes enabled by default on virtually all Cisco devices and can not be turned OFF. Cisco Discovery Protocol (CDP) is an administrative protocol that works at Layer 2 of the Internet Protocol (IP) stack. The protocol has been designed to let devices discover information about other locally attached Cisco equipment in the same network. According to a report Armis research team shared with The Hacker N
Google Accidentally Shared Private Videos of Some Users With Others

Google Accidentally Shared Private Videos of Some Users With Others

February 04, 2020Wang Wei
Google might have mistakenly shared your private videos saved on the company's servers with other users, the tech giant admitted yesterday in a security notification sent quietly to an undisclosed number of affected users. The latest privacy mishap is the result of a "technical issue" in Google's Takeout , a service that backs up all your Google account data into a single file and then lets you download it straight away. According to a screenshot Jon Oberheide of Duo Security shared on Twitter, the issue reportedly remained active between 21st November and 25th November last year, during which "some videos in Google Photos [service] were incorrectly exported to unrelated user's archives." Vice versa, if you had also requested for your account backup during the same 5-day period, you might have even received unrelated videos from other Google accounts. So, the data leak incident potentially affects only those who used Google Takeout service
Sudo Bug Lets Non-Privileged Linux and macOS Users Run Commands as Root

Sudo Bug Lets Non-Privileged Linux and macOS Users Run Commands as Root

February 03, 2020Mohit Kumar
Joe Vennix of Apple security has found another significant vulnerability in sudo utility that under a specific configuration could allow low privileged users or malicious programs to execute arbitrary commands with administrative ('root') privileges on Linux or macOS systems. Sudo is one of the most important, powerful, and commonly used utilities that comes as a core command pre-installed on macOS and almost every UNIX or Linux-based operating system. Sudo has been designed to let users run apps or commands with the privileges of a different user without switching environments. Sudo Vulnerability (CVE-2019-18634) The newly discovered privilege escalation vulnerability, tracked as CVE-2019-18634 , in question stems from a stack-based buffer overflow issue that resides in Sudo versions before 1.8.26. According to Vennix, the flaw can only be exploited when the " pwfeedback " option is enabled in the sudoers configuration file, a feature that provides visua
Microsoft Azure Flaws Could Have Let Hackers Take Over Cloud Servers

Microsoft Azure Flaws Could Have Let Hackers Take Over Cloud Servers

January 30, 2020Mohit Kumar
Cybersecurity researchers at Check Point today disclosed details of two recently patched potentially dangerous vulnerabilities in Microsoft Azure services that, if exploited, could have allowed hackers to target several businesses that run their web and mobile apps on Azure. Azure App Service is a fully-managed integrated service that enables users to create web and mobile apps for any platform or device, and easily integrate them with SaaS solutions, on-premises apps to automate business processes. According to a report researchers shared with The Hacker News, the first security vulnerability ( CVE-2019-1234 ) is a request spoofing issue that affected Azure Stack, a hybrid cloud computing software solution by Microsoft. If exploited, the issue would have enabled a remote hacker to unauthorizedly access screenshots and sensitive information of any virtual machine running on Azure infrastructure—it doesn't matter if they're running on a shared, dedicated or isolated vir
Critical OpenSMTPD Bug Opens Linux and OpenBSD Mail Servers to Hackers

Critical OpenSMTPD Bug Opens Linux and OpenBSD Mail Servers to Hackers

January 30, 2020Wang Wei
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
Citrix Releases Patches for Critical ADC Vulnerability Under Active Attack

Citrix Releases Patches for Critical ADC Vulnerability Under Active Attack

January 20, 2020Mohit Kumar
Citrix has finally started rolling out security patches for a critical vulnerability in ADC and Gateway software that attackers started exploiting in the wild earlier this month after the company announced the existence of the issue without releasing any permanent fix. I wish I could say, "better late than never," but since hackers don't waste time or miss any opportunity to exploit vulnerable systems, even a short window of time resulted in the compromise of hundreds of Internet exposed Citrix ADC and Gateway systems. As explained earlier on The Hacker News, the vulnerability, tracked as CVE-2019-19781 , is a path traversal issue that could allow unauthenticated remote attackers to execute arbitrary code on several versions of Citrix ADC and Gateway products, as well as on the two older versions of Citrix SD-WAN WANOP. Rated critical with CVSS v3.1 base score 9.8, the issue was discovered by Mikhail Klyuchnikov, a security researcher at Positive Technologies, w
Microsoft Warns of Unpatched IE Browser Zero-Day That's Under Active Attacks

Microsoft Warns of Unpatched IE Browser Zero-Day That's Under Active Attacks

January 18, 2020Mohit Kumar
Internet Explorer is dead, but not the mess it left behind. Microsoft earlier today issued an emergency security advisory warning millions of Windows users of a new zero-day vulnerability in Internet Explorer (IE) browser that attackers are actively exploiting in the wild — and there is no patch yet available for it. The vulnerability, tracked as CVE-2020-0674 and rated moderated, is a remote code execution issue that exists in the way the scripting engine handles objects in memory of Internet Explorer and triggers through JScript.dll library. A remote attacker can execute arbitrary code on targeted computers and take full control over them just by convincing victims into opening a maliciously crafted web page on the vulnerable Microsoft browser. "The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as
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