Stantinko Botnet Now Targeting Linux Servers to Hide Behind Proxies
An adware and coin-miner botnet targeting Russia, Ukraine, Belarus, and Kazakhstan at least since 2012 has now set its sights on Linux servers to fly under the radar.
Critical Unpatched VMware Flaw Affects Multiple Corporates Products
VMware has released temporary workarounds to address a critical vulnerability in its products that could be exploited by an attacker to take control of an affected system.
Microsoft Releases Windows Security Updates For Critical Flaws
Microsoft formally released fixes for 112 newly discovered security vulnerabilities as part of its November 2020 Patch Tuesday, including an actively exploited zero-day.
Researcher Discloses Critical RCE Flaws In Cisco Security Manager
Cisco has published multiple security advisories concerning critical flaws in Cisco Security Manager (CSM) a week after the networking equipment maker quietly released patches with version 4.22 of the platform.
Cisco warns of actively exploited IOS XR zero-days
Cisco warned on Saturday about two zero-day vulnerability impacting the Internetwork Operating System (IOS) that ships with its networking equipment.
New Chrome 0-day Under Active Attacks – Update Your Browser Now
Attention readers, if you are using Google Chrome browser on your Windows, Mac, or Linux computers, you need to update your web browsing software immediately to the latest version Google released earlier today.
Google Warns of Zero-Click Bluetooth Flaws in Linux-based Devices
Google security researchers are warning of a new set of zero-click vulnerabilities in the Linux Bluetooth software stack that can allow a nearby unauthenticated, remote attacker to execute arbitrary code with kernel privileges on vulnerable devices.
India Witnessed Spike in Cyber Attacks Amidst Covid-19 - Here's Why?
The COVID-19 outreach is turning out to be not only health, social, and economic hazard but also a cybersecurity crisis. The pandemic has presented new challenges for businesses in the areas of remote collaboration and business continuity.
FIN11 Hackers Spotted Using New Techniques In Ransomware Attacks
A financially-motivated threat actor known for its malware distribution campaigns has evolved its tactics to focus on ransomware and extortion. "Recent FIN11 intrusions have most commonly led to data theft, extortion and the disruption of victim networks via the distribution of CLOP ransomware".
Microsoft Releases Patches For Critical Windows TCP/IP and Other Bugs
Microsoft on Tuesday issued fixes for 87 newly discovered security vulnerabilities as part of its October 2020 Patch Tuesday, including two critical remote code execution (RCE) flaws in Windows TCP/IP stack and Microsoft Outlook.
Google Researcher Reported 3 Flaws in Apache Web Server Software
If your web-server runs on Apache, you should immediately install the latest available version of the server application to prevent hackers from taking unauthorized control over it.
Apache recently fixed multiple vulnerabilities in its web server software that could have potentially led to the execution of arbitrary code and, in specific scenarios, even could allow attackers to cause a crash and denial of service.
The flaws, tracked as CVE-2020-9490, CVE-2020-11984, CVE-2020-11993, were uncovered by Felix Wilhelm of Google Project Zero, and have since been addressed by the Apache Foundation in the latest version of the software (2.4.46).
The first of the three issues involve a possible remote code execution vulnerability due to a buffer overflow with the "mod_uwsgi" module (CVE-2020-11984), potentially allowing an adversary to view, change, or delete sensitive data depending on the privileges associated with an application running on the server.
"[A] Malicious request may result in information disclosure or [remote code execution] of an existing file on the server running under a malicious process environment," Apache noted.
A second flaw concerns a vulnerability that's triggered when debugging is enabled in the "mod_http2" module (CVE-2020-11993), causing logging statements to be made on the wrong connection and therefore resulting in memory corruption due to the concurrent log pool usage.
CVE-2020-9490, the most severe of the three, also resides in the HTTP/2 module and uses a specially crafted 'Cache-Digest' header to cause a memory corruption to lead to a crash and denial of service.
Cache Digest is part of a now-abandoned web optimization feature that aims to address an issue with server pushes — which allows a server to preemptively send responses to a client ahead of time — by allowing the clients to inform the server of their freshly cached contents so that bandwidth is not wasted in sending resources that are already in the client's cache.
Thus when a specially crafted value is injected into the 'Cache-Digest' header in an HTTP/2 request, it would cause a crash when the server sends a PUSH packet using the header. On unpatched servers, this issue can be resolved by turning the HTTP/2 server push feature off.
Although there are currently no reports of these vulnerabilities being exploited in the wild, it's essential that the patches are applied to vulnerable systems immediately after appropriate testing as well as ensure that the application has been configured with only the required permissions so as to mitigate the impact.