kernel: sysctl: restrict write access to dmesg_restrict

The sysrqsysctlhandler function in kernel/sysctl.c in the Linux kernel before 2.6.39 does not require the CAPSYSADMIN capability to modify the dmesgrestrict value, which allows local users to bypass intended access restrictions and read the kernel ring buffer by leveraging root privileges, as...

PT-2012-1800 · Linux +1 · Linux Kernel +1

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 2.6.39 Description: The issue allows local users to bypass intended access restrictions and read the kernel ring buffer by leveraging root privileges. This can be demonstrated by a root user in a Linux Container...