CVE-2010-4078

Published: 29 November 2010

The sisfb_ioctl function in drivers/video/sis/sis_main.c in the Linux kernel before 2.6.36-rc6 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via an FBIOGET_VBLANK ioctl call.

From the Ubuntu Security Team

Dan Rosenberg discovered that the SiS video driver did not correctly clear kernel memory. A local attacker could exploit this to read kernel stack memory, leading to a loss of privacy.

Priority

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Released (2.6.24-28.86)
	karmic	Released (2.6.31-22.73)
	lucid	Not vulnerable
	maverick	Not vulnerable
	upstream	Released (2.6.36~rc6)
	Patches: upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fd02db9de73faebc51240619c7c7f99bee9f65c7
linux-ec2 Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Released (2.6.31-307.27)
	lucid	Not vulnerable
	maverick	Ignored (binary supplied by "linux" now)
	upstream	Released (2.6.36~rc6)
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
	upstream	Released (2.6.36~rc6)
linux-lts-backport-maverick Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Does not exist
	lucid	Not vulnerable
	maverick	Does not exist
	upstream	Released (2.6.36~rc6)
linux-mvl-dove Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Ignored (abandonded branch)
	lucid	Not vulnerable
	maverick	Not vulnerable
	upstream	Released (2.6.36~rc6)
linux-source-2.6.15 Launchpad, Ubuntu, Debian	dapper	Released (2.6.15-55.93)
	hardy	Does not exist
	karmic	Does not exist
	lucid	Does not exist
	maverick	Does not exist
	upstream	Released (2.6.36~rc6)
linux-ti-omap4 Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Does not exist
	lucid	Does not exist
	maverick	Not vulnerable
	upstream	Released (2.6.36~rc6)

References

Bugs

https://bugzilla.redhat.com/show_bug.cgi?id=648665

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