What Hosting Administrators Need to Know A Linux server can run websites smoothly and still have a serious flaw in its operating system. That’s why hosting providers need to pay attention to kernel vulnerabilities, even when their applications and customer accounts appear to work normally. One recent example is ZDI-CAN-33367, a Linux kernel vulnerability that allows a local, unprivileged user to change file contents stored in memory under specific conditions. The affected file may belong to another user or even root, although the attacker normally can read it but not modify it. The vulnerability can create a serious problem for hosting providers that run multiple customer accounts on the same server. If an attacker gains local access, they may use …
