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CVE-2014-5207

Publication date 13 August 2014

Last updated 24 July 2024

Ubuntu priority

High

Why this priority?

fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID, and MNT_NOEXEC and changing MNT_ATIME_MASK during a remount of a bind mount, which allows local users to gain privileges, interfere with backups and auditing on systems that had atime enabled, or cause a denial of service (excessive filesystem updating) on systems that had atime disabled via a "mount -o remount" command within a user namespace.

From the Ubuntu Security Team

Eric W. Biederman discovered a flaw with the mediation of mount flags in the Linux kernel's user namespace subsystem. An unprivileged user could exploit this flaw to by-pass mount restrictions, and potentially gain administrative privileges.

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 15.10 wily
Not affected
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty
Fixed 3.13.0-34.60
12.04 LTS precise
Not affected
10.04 LTS lucid
Not affected
linux-armadaxp 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected
10.04 LTS lucid Not in release
linux-ec2 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid
Not affected
linux-flo 15.10 wily
Not affected
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
linux-fsl-imx51 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Ignored end of life
linux-goldfish 15.10 wily
Not affected
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
linux-grouper 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Ignored end of life
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
linux-linaro-omap 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
10.04 LTS lucid Not in release
linux-linaro-shared 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
10.04 LTS lucid Not in release
linux-linaro-vexpress 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
10.04 LTS lucid Not in release
linux-lts-quantal 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected
10.04 LTS lucid Not in release
linux-lts-raring 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life, was needs-triage
10.04 LTS lucid Not in release
linux-lts-saucy 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life, was pending
10.04 LTS lucid Not in release
linux-lts-trusty 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Fixed 3.13.0-34.60~precise1
10.04 LTS lucid Not in release
linux-lts-utopic 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
linux-lts-vivid 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
linux-maguro 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
linux-mako 15.10 wily
Not affected
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
linux-manta 15.10 wily
Not affected
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Not in release
linux-mvl-dove 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
10.04 LTS lucid Ignored end of life
linux-qcm-msm 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
10.04 LTS lucid Ignored end of life
linux-raspi2 15.10 wily
Not affected
15.04 vivid Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-ti-omap4 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected
10.04 LTS lucid Not in release

Notes

jdstrand

android kernels (goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 13.10 preview kernels android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.04 preview kernels

seth-arnold

this fix was assigned to CVE-2014-5206: db181ce011e3c033328608299cd6fac06ea50130

jdstrand

linux-lts-saucy no longer receives official support

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux

References

Related Ubuntu Security Notices (USN)

    • USN-2318-1
    • Linux kernel vulnerabilities
    • 18 August 2014
    • USN-2317-1
    • Linux kernel (Trusty HWE) vulnerabilities
    • 18 August 2014

Other references