CVE-2010-2946 | Ubuntu

fs/jfs/xattr.c in the Linux kernel before 2.6.35.2 does not properly handle a certain legacy format for storage of extended attributes, which might allow local users by bypass intended xattr namespace restrictions via an "os2." substring at the beginning of a name.

From the Ubuntu Security Team

Sergey Vlasov discovered that JFS did not correctly handle certain extended attributes. A local attacker could bypass namespace access rules, leading to a loss of privacy.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
linux	10.10 maverick	Not affected
	10.04 LTS lucid	Not affected
	9.10 karmic	Fixed 2.6.31-22.67
	9.04 jaunty	Fixed 2.6.28-19.66
	8.04 LTS hardy	Fixed 2.6.24-28.80
	6.06 LTS dapper	Not in release
linux-ec2	10.10 maverick	Ignored end of life
	10.04 LTS lucid	Fixed 2.6.32-309.18
	9.10 karmic	Fixed 2.6.31-307.21
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-fsl-imx51	10.10 maverick	Not in release
	10.04 LTS lucid	Fixed 2.6.31-608.22
	9.10 karmic	Fixed 2.6.31-112.30
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-lts-backport-maverick	10.10 maverick	Not in release
	10.04 LTS lucid	Fixed 2.6.35-25.44~lucid1
	9.10 karmic	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-source-2.6.15	10.10 maverick	Not in release
	10.04 LTS lucid	Not in release
	9.10 karmic	Not in release
	9.04 jaunty	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Fixed 2.6.15-55.89

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
linux	Hardy: http://chinstrap.myasnchisdf.eu.org/~sconklin/CVEs/CVE-2010-2946/patches/hardy/linux/0001-jfs-don-t-allow-os2-xattr-namespace-overlap-with-other.txt Jaunty: http://chinstrap.myasnchisdf.eu.org/~sconklin/CVEs/CVE-2010-2946/patches/jaunty/linux/0001-jfs-don-t-allow-os2-xattr-namespace-overlap-with-other.txt Karmic: http://chinstrap.myasnchisdf.eu.org/~sconklin/CVEs/CVE-2010-2946/patches/karmic/linux/0001-jfs-don-t-allow-os2-xattr-namespace-overlap-with-other.txt
linux-source-2.6.15	Dapper: http://chinstrap.myasnchisdf.eu.org/~sconklin/CVEs/CVE-2010-2946/patches/dapper/linux/0001-jfs-don-t-allow-os2-xattr-namespace-overlap-with-other.txt

Package

Patch details

linux

linux-source-2.6.15

Dapper: http://chinstrap.myasnchisdf.eu.org/~sconklin/CVEs/CVE-2010-2946/patches/dapper/linux/0001-jfs-don-t-allow-os2-xattr-namespace-overlap-with-other.txt

References

Related Ubuntu Security Notices (USN)

USN-1074-1
Linux kernel vulnerabilities
25 February 2011

USN-1083-1
Linux kernel vulnerabilities
3 March 2011

USN-1000-1
Linux kernel vulnerabilities
19 October 2010

USN-1074-2
Linux kernel vulnerabilities
28 February 2011

Other references

https://www.cve.org/CVERecord?id=CVE-2010-2946