CVE-2010-4165

Published: 22 November 2010

The do_tcp_setsockopt function in net/ipv4/tcp.c in the Linux kernel before 2.6.37-rc2 does not properly restrict TCP_MAXSEG (aka MSS) values, which allows local users to cause a denial of service (OOPS) via a setsockopt call that specifies a small value, leading to a divide-by-zero error or incorrect use of a signed integer.

From the Ubuntu Security Team

Steve Chen discovered that setsockopt did not correctly check MSS values. A local attacker could make a specially crafted socket call to crash the system, leading to a denial of service.

Notes

Author	Note
mdeslaur	introduced by http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f5fff5dc8a7a3f395b0525c02ba92c95d42b7390
jdstrand	commit introduced in 2008/09/21. Dapper not affected 2.6.15-57.94. Marking back to 'needed'

Author

Note

mdeslaur

introduced by http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f5fff5dc8a7a3f395b0525c02ba92c95d42b7390

jdstrand

commit introduced in 2008/09/21. Dapper not affected
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 (2.6.37-5.13)
	upstream	Released (2.6.37~rc2)
	Patches: upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7a1abd08d52fdeddb3e9a5a33f2f15cc6a5674d2 hardy: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4165/patches/hardy/linux/0001-tcp-Increase-TCP_MAXSEG-socket-option-minimum.txt karmic: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4165/patches/karmic/linux/0001-tcp-Increase-TCP_MAXSEG-socket-option-minimum.txt lucid: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4165/patches/lucid/linux/0001-tcp-Increase-TCP_MAXSEG-socket-option-minimum.txt maverick: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4165/patches/maverick/linux/0001-tcp-Increase-TCP_MAXSEG-socket-option-minimum.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~rc2)
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~rc2)
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~rc2)
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~rc2)
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~rc2)
linux-source-2.6.15 Launchpad, Ubuntu, Debian	dapper	Ignored
	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~rc2)
	Patches: dapper: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4165/patches/dapper/linux/0001-tcp-Increase-TCP_MAXSEG-socket-option-minimum.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~rc2)

References

Bugs

https://bugzilla.redhat.com/show_bug.cgi?id=652508

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