Vulnerability Monitor

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CVE-2011-4080

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.

Published

2012-05-24T23:55:02.433

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 4.0 (MEDIUM)

CVSSv2 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
Exploitability Score

1.9

Impact Score

6.9

Weaknesses
  • Type: Primary
    CWE-264
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System linux linux_kernel < 2.6.39 Yes
References