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

Author	Note
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

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 (end of life)
	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 (end of life)
	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)

References

Bugs

https://bugzilla.redhat.com/show_bug.cgi?id=656756

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