CVE-2011-4080

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Summary

CVECVE-2011-4080
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2012-05-24 23:55:02 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 4 from [email protected]

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

Problem Types: CWE-264 | n/a

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
High
Authentication
None
Confidentiality
Complete
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org
404 Not Found af854a3a-2127-422b-91ae-364da2661108 ftp.osuosl.org Broken Link
sysctl: restrict write access to dmesg_restrict · torvalds/linux@bfdc0b4 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
oss-security - Re: CVE Request -- kernel: sysctl: restrict write access to dmesg_restrict af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
kernel/git/torvalds/linux.git - Linux kernel source tree MITRE git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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