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CVE-2010-4249

Published: 29 November 2010

The wait_for_unix_gc function in net/unix/garbage.c in the Linux kernel before 2.6.37-rc3-next-20101125 does not properly select times for garbage collection of inflight sockets, which allows local users to cause a denial of service (system hang) via crafted use of the socketpair and sendmsg system calls for SOCK_SEQPACKET sockets.

From the Ubuntu Security Team

Vegard Nossum discovered that memory garbage collection was not handled correctly for active sockets. A local attacker could exploit this to allocate all available kernel memory, leading to a denial of service.

Notes

AuthorNote
mdeslaur
PoC: http://www.exploit-db.com/exploits/15622/
jdstrand
dapper_linux-source-2.6.15 was marked as pending, but not included
in 2.6.15-57.94, marking back to 'needed'
Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy
Released (2.6.24-29.92)
karmic
Released (2.6.31-22.73)
lucid
Released (2.6.32-28.52)
maverick
Released (2.6.35-25.43)
natty
Released (2.6.37-8.20)
upstream
Released (2.6.37~rc4)
Patches:
upstream: http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git;a=commit;h=9915672d41273f5b77f1b3c29b391ffb7732b84b
hardy: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4249/patches/hardy/linux/0001-af_unix-limit-unix_tot_inflight.txt
karmic: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4249/patches/karmic/linux/0001-af_unix-limit-unix_tot_inflight.txt
lucid: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4249/patches/lucid/linux/0001-af_unix-limit-unix_tot_inflight.txt
maverick: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4249/patches/maverick/linux/0001-af_unix-limit-unix_tot_inflight.txt

linux-ec2
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic
Released (2.6.31-307.27)
lucid
Released (2.6.32-312.24)
maverick Ignored
(binary supplied by "linux" now)
natty Does not exist

upstream
Released (2.6.37~rc4)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic
Released (2.6.31-112.30)
lucid
Released (2.6.31-608.22)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc4)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Does not exist

lucid
Released (2.6.35-25.44~lucid1)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc4)
linux-lts-backport-natty
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable
(2.6.38-1.27~lucid1)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc4)
linux-mvl-dove
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Ignored
(abandonded branch)
lucid
Released (2.6.32-214.30)
maverick
Released (2.6.32-414.30)
natty Does not exist

upstream
Released (2.6.37~rc4)
linux-source-2.6.15
Launchpad, Ubuntu, Debian
dapper
Released (2.6.15-57.97)
hardy Does not exist

karmic Does not exist

lucid Does not exist

maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc4)
Patches:





dapper: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4249/patches/dapper/linux/0001-af_unix-limit-unix_tot_inflight.txt
linux-ti-omap4
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Does not exist

lucid Does not exist

maverick
Released (2.6.35-903.22)
natty Not vulnerable
(2.6.38-1201.2)
upstream
Released (2.6.37~rc4)