CVE-2010-2071

Publication date 16 June 2010

Last updated 24 July 2024

Ubuntu priority

The btrfs_xattr_set_acl function in fs/btrfs/acl.c in btrfs in the Linux kernel 2.6.34 and earlier does not check file ownership before setting an ACL, which allows local users to bypass file permissions by setting arbitrary ACLs, as demonstrated using setfacl.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
linux	10.04 LTS lucid	Fixed 2.6.32-24.39
	9.10 karmic	Fixed 2.6.31-22.61
	9.04 jaunty	Not affected
	8.04 LTS hardy	Not affected
	6.06 LTS dapper	Not in release
linux-source-2.6.15	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	Not affected

Notes

smb

Btrfs did not appear before Karmic

Patch details

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

Package	Patch details
linux	Upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2f26afba46f0ebf155cf9be746496a0304a5b7cf Karmic: http://chinstrap.sne.bianheman.eu.org/~smb/CVEs/CVE-2010-2071/patches/karmic/linux/0001-Btrfs-should-add-a-permission-check-for-setfacl.txt Lucid: http://chinstrap.sne.bianheman.eu.org/~smb/CVEs/CVE-2010-2071/patches/lucid/linux/0001-Btrfs-should-add-a-permission-check-for-setfacl.txt

Package

Patch details

linux

References

Related Ubuntu Security Notices (USN)

USN-966-1
Linux kernel vulnerabilities
4 August 2010

Other references

https://www.cve.org/CVERecord?id=CVE-2010-2071