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CVE-2011-3188

Published: 25 August 2011

The (1) IPv4 and (2) IPv6 implementations in the Linux kernel before 3.1 use a modified MD4 algorithm to generate sequence numbers and Fragment Identification values, which makes it easier for remote attackers to cause a denial of service (disrupted networking) or hijack network sessions by predicting these values and sending crafted packets.

From the Ubuntu security team

Dan Kaminsky discovered that the kernel incorrectly handled random sequence number generation. An attacker could use this flaw to possibly predict sequence numbers and inject packets.

Notes

AuthorNote
jdstrand
http://git.kernel.org/linus/bc0b96b54a21246e377122d54569eef71cec535f
http://git.kernel.org/linus/6e5714eaf77d79ae1c8b47e3e040ff5411b717ec
Priority

Medium

CVSS 3 base score: 9.1

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
hardy
Released (2.6.24-29.95)
lucid
Released (2.6.32-35.78)
maverick
Released (2.6.35-30.61)
natty
Released (2.6.38-12.51)
oneiric Not vulnerable
(3.0.0-9.12)
upstream
Released (3.1~rc1)
Patches:
upstream: http://git.kernel.org/linus/bc0b96b54a21246e377122d54569eef71cec535f
upstream: http://git.kernel.org/linus/6e5714eaf77d79ae1c8b47e3e040ff5411b717ec
linux-ec2
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.32-319.39)
maverick Ignored
(binary supplied by "linux" now)
natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc1)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.31-611.29)
maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc1)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.35-30.61~lucid1)
maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc1)
linux-lts-backport-natty
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.38-12.51~lucid1)
maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc1)
linux-lts-backport-oneiric
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable

maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc1)
linux-mvl-dove
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.32-219.37)
maverick
Released (2.6.32-419.37)
natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Does not exist

maverick
Released (2.6.35-903.25)
natty
Released (2.6.38-1209.16)
oneiric Not vulnerable
(3.0.0-1204.9)
upstream
Released (3.1~rc1)