Upstream information

CVE-2011-4080 at MITRE


The sysrq_sysctl_handler function in kernel/sysctl.c in the Linux kernel before 2.6.39 does not require the CAP_SYS_ADMIN capability to modify the dmesg_restrict value, which allows local users to bypass intended access restrictions and read the kernel ring buffer by leveraging root privileges, as demonstrated by a root user in a Linux Containers (aka LXC) environment.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 4
Vector AV:L/AC:H/Au:N/C:C/I:N/A:N
Access Vector Local
Access Complexity High
Authentication None
Confidentiality Impact Complete
Integrity Impact None
Availability Impact None

Note from the SUSE Security Team

This issue affects a hardening measure introduced in the 2.6.37 Linux kernel. It does not affect older kernels and so products like SUSE Linux Enterprise 11 SP1 or earlier releases are not affected by this problem.

SUSE Bugzilla entry: 726772 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.