Barracuda | Breaking Cybersecurity News | The Hacker News

Barracuda has revealed that Chinese threat actors exploited a new zero-day in its Email Security Gateway (ESG) appliances to deploy backdoors on a "limited number" of devices. Tracked as  CVE-2023-7102 , the issue relates to a case of  arbitrary code execution  that resides within a third-party and open-source library named Spreadsheet::ParseExcel that's used by the Amavis scanner within the gateway to screen Microsoft Excel email attachments for malware. The company attributed the activity to a threat actor tracked by Google-owned Mandiant as  UNC4841 , which was previously linked to the  active exploitation  of another zero-day in Barracuda devices (CVE-2023-2868, CVSS score: 9.8) earlier this year. Successful exploitation of the new flaw is accomplished by means of a specially crafted Microsoft Excel email attachment. This is followed by the deployment of new variants of known implants called  SEASPY and SALTWATER  that are equipped to offer persistence and comman

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday disclosed details of a "novel persistent backdoor" called  SUBMARINE  deployed by threat actors in connection with the hack on Barracuda Email Security Gateway (ESG) appliances. "SUBMARINE comprises multiple artifacts — including a SQL trigger, shell scripts, and a loaded library for a Linux daemon — that together enable execution with root privileges, persistence, command and control, and cleanup," the agency  said . The findings come from an analysis of malware samples obtained from an unnamed organization that had been compromised by threat actors exploiting a critical flaw in ESG devices,  CVE-2023-2868  (CVSS score: 9.8), which allows for remote command injection. Evidence gathered so far shows that the attackers behind the activity, a suspected China nexus-actor tracked by Mandiant as  UNC4841 , leveraged the flaw as a zero-day in October 2022 to gain initial access to victim envir

For years, securing a company's systems was synonymous with securing its "perimeter." There was what was safe "inside" and the unsafe outside world. We built sturdy firewalls and deployed sophisticated detection systems, confident that keeping the barbarians outside the walls kept our data and systems safe. The problem is that we no longer operate within the confines of physical on-prem installations and controlled networks. Data and applications now reside in distributed cloud environments and data centers, accessed by users and devices connecting from anywhere on the planet. The walls have crumbled, and the perimeter has dissolved, opening the door to a new battlefield: identity . Identity is at the center of what the industry has praised as the new gold standard of enterprise security: "zero trust." In this paradigm, explicit trust becomes mandatory for any interactions between systems, and no implicit trust shall subsist. Every access request, regardless of its origin,

Enterprise security company Barracuda is now urging customers who were impacted by a recently disclosed zero-day flaw in its Email Security Gateway (ESG) appliances to immediately replace them. "Impacted ESG appliances must be immediately replaced regardless of patch version level," the company  said  in an update, adding its "remediation recommendation at this time is full replacement of the impacted ESG." While the company did not disclose the reasons behind the move, it's likely an indication that the threat actors behind the campaign managed to tamper with the firmware on a much deeper level that a patch cannot completely address. The latest development comes as Barracuda  disclosed  that a critical flaw in the devices (CVE-2023-2868, CVSS score: 9.8) had been exploited as a zero-day for at least seven months since October 2022 to deliver bespoke malware and steal data. The  vulnerability  concerns a case of remote code injection affecting versions 5.1

Enterprise security firm Barracuda on Tuesday disclosed that a recently patched zero-day flaw in its Email Security Gateway (ESG) appliances had been abused by threat actors since October 2022 to backdoor the devices. The latest  findings  show that the  critical vulnerability , tracked as  CVE-2023-2868  (CVSS score: N/A), has been actively exploited for at least seven months prior to its discovery. The flaw, which Barracuda identified on May 19, 2023, affects versions 5.1.3.001 through 9.2.0.006 and could allow a remote attacker to achieve code execution on susceptible installations. Patches were released by Barracuda on May 20 and May 21. "CVE-2023-2868 was utilized to obtain unauthorized access to a subset of ESG appliances," the network and email security company  said  in an updated advisory. "Malware was identified on a subset of appliances allowing for persistent backdoor access. Evidence of data exfiltration was identified on a subset of impacted appliance

Email protection and network security services provider Barracuda is warning users about a zero-day flaw that it said has been exploited to breach the company's Email Security Gateway (ESG) appliances. The zero-day is being tracked as  CVE-2023-2868  and has been described as a remote code injection vulnerability affecting versions 5.1.3.001 through 9.2.0.006. The California-headquartered firm  said  the issue is rooted in a component that screens the attachments of incoming emails. "The vulnerability arises out of a failure to comprehensively sanitize the processing of .tar file (tape archives)," according to an  advisory  from the NIST's national vulnerability database. "The vulnerability stems from incomplete input validation of a user-supplied .tar file as it pertains to the names of the files contained within the archive. As a consequence, a remote attacker can specifically format these file names in a particular manner that will result in remotely exe