CVE-2011-1080

Published: 25 July 2011

The do_replace function in net/bridge/netfilter/ebtables.c in the Linux kernel before 2.6.39 does not ensure that a certain name field ends with a '\0' character, which allows local users to obtain potentially sensitive information from kernel stack memory by leveraging the CAP_NET_ADMIN capability to replace a table, and then reading a modprobe command line.

From the Ubuntu security team

Vasiliy Kulikov discovered that bridge network filtering did not check that name fields were NULL terminated. A local attacker could exploit this to leak contents of kernel stack memory, leading to a loss of privacy.

Priority

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	hardy	Released (2.6.24-29.93)
	lucid	Released (2.6.32-32.62)
	maverick	Released (2.6.35-30.52)
	natty	Released (2.6.38-9.43)
	oneiric	Not vulnerable (2.6.39-0.1)
	upstream	Released (2.6.39~rc1)
linux-ec2 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.32-316.30)
	maverick	Ignored (binary supplied by "linux" now)
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (2.6.39~rc1)
linux-fsl-imx51 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.31-610.27)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (2.6.39~rc1)
linux-lts-backport-maverick Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.35-30.54~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (2.6.39~rc1)
linux-lts-backport-natty Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.38-9.43~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (2.6.39~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 (2.6.39~rc1)
linux-mvl-dove Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.32-217.34)
	maverick	Released (2.6.32-417.34)
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (2.6.39~rc1)
linux-ti-omap4 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	maverick	Released (2.6.35-903.23)
	natty	Released (2.6.38-1209.13)
	oneiric	Not vulnerable (2.6.38-1309.13)
	upstream	Released (2.6.39~rc1)

References

Bugs

https://launchpad.net/bugs/816545

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