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Vulnerability Details : 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.
Publish Date : 2012-05-24 Last Update Date : 2020-07-28
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- CVSS Scores & Vulnerability Types

CVSS Score
4.0
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity High (Specialized access conditions exist. It is hard to exploit and several special conditions must be satisfied to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 264

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2012:0481: kernel security, bug fix, and enhancement update (Moderate) oval:com.redhat.rhsa:def:20120481 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2011-4080

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2011-4080

http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 CONFIRM
https://github.com/torvalds/linux/commit/bfdc0b497faa82a0ba2f9dddcf109231dd519fcc CONFIRM
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bfdc0b497faa82a0ba2f9dddcf109231dd519fcc CONFIRM
http://www.openwall.com/lists/oss-security/2011/10/26/10
MLIST [oss-security] 20111026 Re: CVE Request -- kernel: sysctl: restrict write access to dmesg_restrict

- Metasploit Modules Related To CVE-2011-4080

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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