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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4 UNKNOWN
LOCAL
HIGH
AV:L/AC:H/Au:N/C:C/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 22%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
𝑥
< 2.6.39
𝑥
= Vulnerable software versions
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
hardy
not-affected
lucid
not-affected
maverick
not-affected
natty
not-affected
oneiric
not-affected
precise
not-affected
linux-armadaxp
hardy
dne
lucid
dne
natty
dne
oneiric
dne
precise
not-affected
linux-ec2
hardy
dne
lucid
not-affected
maverick
ignored
natty
dne
oneiric
dne
precise
dne
linux-fsl-imx51
hardy
dne
lucid
not-affected
maverick
dne
natty
dne
oneiric
dne
precise
dne
linux-lts-backport-maverick
hardy
dne
lucid
not-affected
maverick
dne
natty
dne
oneiric
dne
precise
dne
linux-lts-backport-natty
hardy
dne
lucid
not-affected
maverick
dne
natty
dne
oneiric
dne
precise
dne
linux-lts-backport-oneiric
hardy
dne
lucid
not-affected
maverick
dne
natty
dne
oneiric
dne
precise
dne
linux-mvl-dove
hardy
dne
lucid
ignored
maverick
not-affected
natty
dne
oneiric
dne
precise
dne
linux-ti-omap4
hardy
dne
lucid
dne
maverick
not-affected
natty
not-affected
oneiric
not-affected
precise
not-affected
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
kernel
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-bootwrapper
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-debug
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-debug-devel
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-devel
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-doc
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-firmware
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-headers
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-kdump
RHEL 6
0:2.6.32-220.13.1.el6
fixed
kernel-kdump-devel
RHEL 6
0:2.6.32-220.13.1.el6
fixed
perf
RHEL 6
0:2.6.32-220.13.1.el6
fixed
python-perf
RHEL 6
0:2.6.32-220.13.1.el6
fixed
Common Weakness Enumeration
References
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bfdc0b497faa82a0ba2f9dddcf109231dd519fcc
http://www.openwall.com/lists/oss-security/2011/10/26/10
https://github.com/torvalds/linux/commit/bfdc0b497faa82a0ba2f9dddcf109231dd519fcc
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bfdc0b497faa82a0ba2f9dddcf109231dd519fcc
http://www.openwall.com/lists/oss-security/2011/10/26/10
https://github.com/torvalds/linux/commit/bfdc0b497faa82a0ba2f9dddcf109231dd519fcc