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The Microsoft Security Response Centre released a blog post this week about a Service Fabric (SF) Linux Cluster vulnerability. This bug has been identified on both Linux and Windows operating systems, however Microsoft claims only Linux is vulnerable to attack. This vulnerability was published as CVE-2022-30137 by Microsoft earlier this month.  Azure Service Fabric is a distributed systemsRead more

A new Linux backdoor threat has been discovered, using malware known as ‘Symbiote’. This name has come from its ability to hide itself well, whilst stealing data and credentials from the ‘host’ victim. A threat report released last week by Intezer and The BlackBerry Threat Research & Intelligence Team details how this malware works, and why it’sRead more

Researchers at Microsoft have documented a family of vulnerabilities that affect Linux systems, dubbed Nimbuspwn.  These vulnerabilities can be chained together in order to gain root privileges on Linux systems allowing attackers to install malware and access all data on the server. The vulnerabilities in the networkd-dispatcher are tracked as CVE-2022-29799 and CVE-2022-29800.   Networkd-dispatcher runs as root andRead more

A serious remote code execution vulnerability has been discovered in the Samba file sharing software.  This bug allows an unauthenticated attacker to execute arbitrary code as root on an affected server.  With a CVSS score of 9.9, this vulnerability affects Samba’s default configurations. Samba is a popular freeware utility that supports the SMB (Server MessageRead more

A 12 year old bug has been discovered in the Linux pkexec utility which allows any unprivileged user to gain full root privileges on a vulnerable host. The new report from security researchers at Qualys explains how the vulnerability can be exploited. In summary the vulnerability, dubbed PwnKit, allows any unprivileged user to gain fullRead more

The October security patch updates include fixes for critical flaws and zero-day vulnerabilities from Microsoft, Apple and Apache. Microsoft October Updates October’s security patch bundle from Microsoft includes fixes for four zero-day vulnerabilities, at least one of which is actively being exploited in the wild. Overall Microsoft fixes 70 vulnerabilities include the first inclusion ofRead more

The September Patch Tuesday security bundle from Microsoft fixes 60 vulnerabilities including some rated as Critical and a zero-day vulnerability under active attack affecting Microsoft Office. Microsoft Security updates for September Microsoft MSHTML Remote Code Execution Vulnerability (CVE-2021-40444) was publicised in early September when Microsoft warned Office 365 customers about the vulnerability.  The flaw wasRead more

21 critical vulnerabilities have been discovered in the Exim Email server, some of which can be exploited to perform full remote unauthenticated code execution and gain root privilege on the server. Called 21Nails, this set of vulnerabilities is, to the Unix world, as serious as the ProxyLogon vulnerabilities recently discovered in Microsoft Exchange Server. TheRead more

A serious bug in the Linux SUDO utility has been discovered that allows any user to gain root privilege on a Linux system. The flaw was discovered by security firm Qualys and they describe it in their blog post as a heap overflow vulnerability that means: any unprivileged user can gain root privileges on aRead more

Boothole is a pervasive vulnerability that affects the GRUB2 boot loader that is used by most versions of Linux.  By exploiting this vulnerability, attackers can run arbitrary code on almost any PC or Server and install RootKits or similar Malware that will persist reboots and be very difficult to detect. BootHole was first reported byRead more