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

Petr Matousek · Published 2012-04-17 · Updated 2023-02-13 · CVE-2011-4080

Positive Technologies (AI Summary)

CVSS v2.0

4.0

Medium

Base vector

AV:L/AC:H/Au:N/C:C/I:N/A:N

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 Containers (aka LXC) environment. The sysrq sysctl handler function in kernel/sysctl.c does not require the CAP SYS ADMIN capability to modify the dmesg restrict value.

Recommendations For Linux kernel versions prior to 2.6.39, update to version 2.6.39 or later to resolve the issue.

Fix

Weakness Enumeration

CWE-264

Related Identifiers

CVE-2011-4080

RHSA-2012:0481

RHSA-2012_0481

Affected Products

Linux Kernel

Red Hat

References · 11

• https://github.com/torvalds/linux/commit/bfdc0b497faa82a0ba2f9dddcf109231dd519fcc · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2011-4080 · Security Note
• https://bdu.fstec.ru/vul/2015-01796 · Security Note
• https://access.redhat.com/errata/RHSA-2012:0481 · Note
• https://access.redhat.com/security/cve/CVE-2012-1097 · Note
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bfdc0b497faa82a0ba2f9dddcf109231dd519fcc · Note
• http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 · Note
• https://access.redhat.com/security/cve/CVE-2012-1090 · Note
• https://access.redhat.com/security/cve/CVE-2012-0879 · Note
• https://access.redhat.com/security/cve/CVE-2011-4080 · Note
• http://openwall.com/lists/oss-security/2011/10/26/10 · Note