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CVE-2011-4080
Published: May 24, 2012
Modified: Aug 6, 2024
PUBLISHED
Description
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.
| Vendor | Product | Versions |
|---|---|---|
n/a | n/a | affected n/a |
References
[oss-security] 20111026 Re: CVE Request -- kernel: sysctl: restrict write access to dmesg_restrict
mailing-list
x_refsource_MLIST
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
x_refsource_CONFIRM
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