Cisco has rolled out security updates to address a critical flaw reported in the ClamAV open source antivirus engine that could lead to remote code execution on susceptible devices. . Tracked as CVE-2023-20032 (CVSS score: 9.8), the issue relates to a case of remote code execution residing in the HFS+ file parser component. The flaw affects versions 1.0.0 and earlier, 0.105.1 and earlier, and 0.103.7 and earlier. Google security engineer Simon Scannell has been credited with discovering and reporting the bug. "This vulnerability is due to a missing buffer size check that may result in a heap buffer overflow write," Cisco Talos said in an advisory. "An attacker could exploit this vulnerability by submitting a crafted HFS+ partition file to be scanned by ClamAV on an affected device." The link for this article located at The Hacker News is no longer available. . Serious vulnerability in ClamAV opens the door for remote code execution threats; Cisco has released a security patch to protect affected systems.. ClamAV Remote Execution, Cisco Security Update, Antivirus Vulnerability, Open Source Security. . LinuxSecurity.com Team
Experts warn of a critical Linux Kernel vulnerability (CVSS score of 10) impacting SMB servers that can lead to remote code execution. . A critical Linux kernel vulnerability (CVSS score of 10) exposes SMB servers with ksmbd enabled to hack. KSMBD is a Linux kernel server that implements SMB3 protocol in kernel space for sharing files over the network. An unauthenticated, remote attacker can execute arbitrary code on vulnerable installations of the Linux Kernel. The flaw resides in the processing of SMB2_TREE_DISCONNECT commands. “This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable.” reads the advisory published by ZDI. “The specific flaw exists within the processing of SMB2_TREE_DISCONNECT commands. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the kernel.” . A severe flaw in the Linux kernel (CVSS rating of 10) puts SMB servers that utilize ksmbd at risk of distant data corruption.. Linux Kernel Flaw, SMB Server Threat, Remote Code Execution, KSMBD Vulnerability. . Brittany Day
Merry Christmas, Linux systems administrators: Here's a kernel vulnerability with a CVSS score of 10 in your SMB server for the holiday season giving an unauthenticated user remote code execution. . Yes, this sounds bad, and a score of 10 isn't reassuring at all. Luckily for the sysadmins reaching for more brandy to pour in that eggnog, it doesn't appear to be that widespread. Discovered the Thalium Team vulnerability research team at French aerospace firm Thales Group in July, the vulnerability is specific to the ksmbd module that was added to the Linux kernel in version 5.15 . Disclosure was responsibly held until a patch was issued. Unlike that other popular SMB server for Linux, which runs in userspace, ksmbd operates in the kernel. That triggered alarm bells among some users discussing its merge last year. . Linux admins, critical holiday alert: a CVSS 10 kernel vulnerability has been found, allowing remote code execution. Patch your systems urgently to prevent exploitation. Kernel Bug, Linux Admins, Remote Execution, Critical Security Issue. . Brittany Day
IBM has admitted to making 'a process error, improper response' to a bug report that identified four vulnerabilities in its enterprise security software, and the tech giant plans to issue an advisory. . IBM Data Risk Manager offers security-focused vulnerability scanning and analytics, to help businesses identify weaknesses in their infrastructure. At least some versions of the Linux-powered suite included four exploitable holes, identified and, at first, privately disclosed by security researcher Pedro Ribeiro at no charge. Three are considered to be critical, and one is high risk. The software flaws can be chained together to achieve unauthenticated remote code execution as root on a vulnerable installation, as described in an advisory Ribeiro published today on GitHub. . Critical vulnerabilities in IBM Data Risk Manager have surfaced, tied to remote execution flaws due to unexpected response anomalies. Discover these security risks and their impacts. IBM Data Risk Manager, security vulnerabilities, remote code execution, data risk management, enterprise security. . Brittany Day
Server-side exploitation is possible when the attacker connects to the OpenSMTPD server and sends an email that creates a bounce. When OpenSMTPD connects back to deliver the bounce, the attacker can take advantage of the client-side vulnerability. . Security researchers have discovered a new critical vulnerability in the OpenSMTPD email server. An attacker could exploit it remotely to run shell commands as root on the underlying operating system. OpenSMTPD is present on many Unix-based systems, including FreeBSD, NetBSD, macOS, Linux (Alpine, Arch, Debian, Fedora, CentOS). The link for this article located at Bleeping Computer is no longer available. . Recent security flaw in OpenSMTPD introduces potential for remote code execution, creating significant risks for Linux operating platforms.. OpenSMTPD Vulnerability, Remote Code Execution, Email Server Threats. . Brittany Day
The PHP development team has fixed a bug that could allow remote code execution in some setups of the programming language. Get the details: . The PHP development team has fixed a bug that could allow remote code execution in some setups of the programming language, possibly allowing attackers to take over any site running the code remotely. PHP is a common programming language used to run dynamic websites. It operates everything from online forums to ecommerce systems. The bug, found in version 7 of PHP, only affects instances running the PHP FastCGI Process Manager (PHP-FPM) , which is an alternative implementation of a standard PHP module called FastCGI. It lets an interpreter outside the web server execute scripts. The process manager version includes some extra features to support high-volume websites. For the bug to work, the website must also be running the Nginx web server, which runs on around one in every three websites, according to W3techs . The link for this article located at Naked Security is no longer available. . The PHP development team has addressed a critical vulnerability revealing potential remote code execution risks, affecting websites that utilize Nginx in conjunction with PHP-FPM.. remote Code Execution, PHP-FPM, Nginx Exploit. . Brittany Day
Are you a Joomla user? Details have been published online last week about a vulnerability in older versions of the Joomla content management system (CMS), a popular web-based application for building and managing websites. Learn more in a great ZDNet article: . The vulnerability was discovered by Italian security researcher Alessandro Groppo of Hacktive Security, and impacts all Joomla versions from 3.0.0 to 3.4.6, released between late September 2012 to mid-December 2015. The vulnerability is trivial to exploit, and proof-of-concept exploit code has been published online. It's a PHP object injection that can lead to remote code execution (RCE) under certain scenarios. For example, it can be exploited via the Joomla CMS' login form and can allow attackers to execute code on the site's underlying server. The link for this article located at ZDNet is no longer available. . A serious remote code execution vulnerability in Joomla CMS versions 3.0.0 to 3.4.6 has been discovered, requiring immediate attention.. joomla, details, published, online, about, vulnerability, older. . Brittany Day
Just a quick reminder about some bad practices while handling Windows Administrator credentials. I'm constantly changing my hunting filters on VT. A few days ago, I started to search for files/scripts that use the Microsoft SysInternals tool psexec[1]. . For system administrators, this a great tool to execute programs on remote systems but it is also used by attackers to pivot internally. This morning, my filter returned an interesting file with a VT score of 11/66. The file is a compiled AutoIT script. This kind of malicious files is coming back via regular waves[2]. AutoIT executable can be easily decompiled. To achieve this, I'm using Exe2Aut.exe[3]. This tool has not been updated for a while but is still doing a good job.. To maintain security, enforce strong password policies, utilize Role-Based Access Control (RBAC), and implement Multi-Factor Authentication (MFA) for Windows Admins. Administrator Practices, Remote Execution Security, Bad Credential Management. . LinuxSecurity.com Team
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