CVEvulnerability
CVE-2011-4080
4.0 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2012-05-24
- Last modified
- 2026-06-16
- Assigner
- [email protected]
- CVSS 2.0 ([email protected])
- 4.0 MEDIUM — AV:L/AC:H/Au:N/C:C/I:N/A:N
- Weaknesses
- CWE-264
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.
Affected configurations
• linux linux kernel (< 2.6.39)
Related
Weakness · not in database (1)
References
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 Broken Link
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bfdc0b497faa82a0ba2f9dddcf109231dd519fcc git.kernel.org
- http://www.openwall.com/lists/oss-security/2011/10/26/10 Mailing List, Third Party Advisory
- https://github.com/torvalds/linux/commit/bfdc0b497faa82a0ba2f9dddcf109231dd519fcc Patch, Third Party Advisory
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 Broken Link
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bfdc0b497faa82a0ba2f9dddcf109231dd519fcc git.kernel.org
- http://www.openwall.com/lists/oss-security/2011/10/26/10 Mailing List, Third Party Advisory
- https://github.com/torvalds/linux/commit/bfdc0b497faa82a0ba2f9dddcf109231dd519fcc Patch, Third Party Advisory