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Zimbra has warned of a critical zero-day security flaw in its email software that has come under active exploitation in the wild. "A security vulnerability in Zimbra Collaboration Suite Version 8.8.15 that could potentially impact the confidentiality and integrity of your data has surfaced," the company  said  in an advisory. It also said that the issue has been addressed and that it's expected to be delivered in the July patch release. Additional specifics about the flaw are currently unavailable, although Zimbra said it fixed the issue through input sanitization. In the interim, it is urging customers to  apply a manual fix  to eliminate the attack vector - Take a backup of the file /opt/zimbra/jetty/webapps/zimbra/m/momoveto Edit this file and go to line number 40 Update the parameter value as: <input name="st" type="hidden" value="${fn:escapeXml(param.st)}"/> Before the update, the line appeared as: <input name="st...

Government entities, military organizations, and civilian users in Ukraine and Poland have been targeted as part of a series of campaigns designed to steal sensitive data and gain persistent remote access to the infected systems. The intrusion set, which stretches from April 2022 to July 2023, leverages phishing lures and decoy documents to deploy a downloader malware called PicassoLoader, which acts as a conduit to launch Cobalt Strike Beacon and njRAT. "The attacks used a multistage infection chain initiated with malicious Microsoft Office documents, most commonly using Microsoft Excel and PowerPoint file formats," Cisco Talos researcher Vanja Svajcer  said  in a new report. "This was followed by an executable downloader and payload concealed in an image file, likely to make its detection more difficult." Some  of the  activities  have been attributed to a threat actor called GhostWriter (aka UAC-0057 or UNC1151), whose priorities are said to align with th...

As many as 196 hosts have been infected as part of an aggressive cloud campaign mounted by the TeamTNT group called  Silentbob . "The botnet run by TeamTNT has set its sights on Docker and Kubernetes environments, Redis servers, Postgres databases, Hadoop clusters, Tomcat and Nginx servers, Weave Scope, SSH, and Jupyter applications," Aqua security researchers Ofek Itach and Assaf Morag  said  in a report shared with The Hacker News. "The focus this time seems to be more on infecting systems and testing the botnet, rather than deploying cryptominers for profit." The development arrives a week after the cloud security company  detailed  an intrusion set linked to the TeamTNT group that targets exposed JupyterLab and Docker APIs to deploy the Tsunami malware and hijack system resources to run a cryptocurrency miner. The latest findings suggest a broader campaign and the use of a larger attack infrastructure than previously thought, including various shell sc...

In a sign that cybersecurity researchers continue to be under the radar of malicious actors, a proof-of-concept (PoC) has been discovered on GitHub, concealing a backdoor with a "crafty" persistence method. "In this instance, the PoC is a wolf in sheep's clothing, harboring malicious intent under the guise of a harmless learning tool," Uptycs researchers Nischay Hegde and Siddartha Malladi  said . "Operating as a downloader, it silently dumps and executes a Linux bash script, all the while disguising its operations as a kernel-level process." The  repository  masquerades as a PoC for  CVE-2023-35829 , a recently disclosed high-severity flaw in the Linux kernel. It has since been taken down, but not before it was forked 25 times.  Another PoC  shared by the same account, ChriSanders22, for  CVE-2023-20871 , a privilege escalation bug impacting VMware Fusion, was forked twice. Uptypcs also identified a  second GitHub profile  containing a b...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has alerted of two security flaws impacting Rockwell Automation ControlLogix EtherNet/IP (ENIP) communication module models that could be exploited to achieve remote code execution and denial-of-service (DoS). "The results and impact of exploiting these vulnerabilities vary depending on the ControlLogix system configuration, but they could lead to denial or loss of control, denial or loss of view, theft of operational data, or manipulation of control for disruptive or destructive consequences on the industrial process for which the ControlLogix system is responsible," Draogos  said . The list of flaws is as follows - CVE-2023-3595  (CVSS score: 9.8) - An out-of-bounds write flaw impacting 1756 EN2* and 1756 EN3* products that could result in arbitrary code execution with persistence on the target system through maliciously crafted common industrial protocol ( CIP ) messages. CVE-2023-3596  (CVSS score:...