Security News
Exchange Servers targeted via zero-day exploits, have yours been hit?Microsoft has released out-of-band security updates for seven bugs affecting Microsoft Exchange Servers, four of which are zero-day vulnerabilities being exploited by attackers in the wild to plunder on-premises machines. March 2021 Patch Tuesday forecast: Off to an early startMicrosoft got an early start on Patch Tuesday, releasing a series of out-of-band security updates for actively exploited bugs in Exchange Server.
Microsoft got an early start on Patch Tuesday, releasing a series of out-of-band security updates this week to address four zero-day vulnerabilities in Exchange Server. Early reports from the field indicate the updates apply smoothly following Microsoft's directions, with a reboot required.
"CISA has determined that this exploitation of Microsoft Exchange on-premises products poses an unacceptable risk to Federal Civilian Executive Branch agencies and requires emergency action," reads the March 3 alert. "With organizations migrating to Microsoft Office 365 en masse over the last few years, it's easy to forget that on-premises Exchange servers are still in service," Saryu Nayyar, CEO, Gurucul, said via email.
The Department of Homeland Security's cybersecurity unit has ordered federal agencies to urgently update or disconnect Microsoft Exchange on-premises products on their networks. CISA "Strongly" recommended federal agencies to examine their networks to detect malicious activity related to zero-day attacks targeting Exchange servers.
Microsoft has released emergency out-of-band security updates for all supported Microsoft Exchange versions that fix four zero-day vulnerabilities actively exploited in targeted attacks. These four zero-day vulnerabilities are chained together to gain access to Microsoft Exchange servers, steal email, and plant further malware for increased access to the network.
In early November, a developer contributing to Google's open-source Chromium project reported a problem with Oilpan, the garbage collector for the browser's Blink rendering engine: it can be used to break a memory defense known as address space layout randomization. About two weeks later, Google software security engineer Chris Palmer marked the bug "WontFix" because Google has resigned itself to the fact that ASLR can't be saved - Spectre and Spectre-like processor-level flaws can defeat it anyway, whether or not Oilpan can be exploited.
The day after VMware released fixes for a critical RCE flaw found in a default vCenter Server plugin, opportunistic attackers began searching for publicly accessible vulnerable systems. We've detected mass scanning activity targeting vulnerable VMware vCenter servers.
CD Projekt Red announced today that they are delaying the anticipated Cyberpunk 2077 Patch 1.2 to the second half of March 2021 due to their recent cyberattack. Patch 1.2 is expected to be a major release containing many bug fixes and performance improvements for known issues that players are experiencing.
VMware has addressed multiple critical remote code execution vulnerabilities in VMware ESXi and vSphere Client virtual infrastructure management platform that may allow attackers to execute arbitrary commands and take control of affected systems. The vulnerability, tracked as CVE-2021-21972, has a CVSS score of 9.8 out of a maximum of 10, making it critical in severity.
Keybase, owned by online meeting and teleconferencing behemoth Zoom, is a secure messaging and file sharing service that describes itself as providing "End-to-end encryption for things that matter." If you copy an unencrypted file from a USB drive to your laptop, for example, before uploading it into a service such as Keybase, neither the Keybase app nor the Keybase servers can do anything about those two unencrypted copies of the file that now exist.