CVE-2014-7284

Published: 13 October 2014

The net_get_random_once implementation in net/core/utils.c in the Linux kernel 3.13.x and 3.14.x before 3.14.5 on certain Intel processors does not perform the intended slow-path operation to initialize random seeds, which makes it easier for remote attackers to spoof or disrupt IP communication by leveraging the predictability of TCP sequence numbers, TCP and UDP port numbers, and IP ID values.

From the Ubuntu security team

Tuomas Räsänen reported the Linux kernel on certain Intel processors does not properly initialize random seeds for network operations, causing TCP sequence numbers, TCP and UDP port numbers and IP ID values to be predictable. A remote attacker could exploit this flaw to spoof or disrupt IP communication.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.13.0-32.57)
Patches:
Introduced by a48e42920ff38bc90bbf75143fff4555723d4540
Fixed by 3d4405226d27b3a215e4d03cfa51f536244e5de7
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected [3.16.0-25.33~14.04.2])
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected [3.19.0-18.18~14.04.1])
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.15~rc7)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Notes

AuthorNote
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support
per apw, this was fixed in passing in 3.13.0-39.66~precise1, part of
https://ubuntu.com/security/notices/USN-2394-1, but not documented in the changelog or
the USN.

References

Bugs