CVE-2010-2943
Description
The xfs implementation in the Linux kernel before 2.6.35 does not look up inode allocation btrees before reading inode buffers, which allows remote authenticated users to read unlinked files, or read or overwrite disk blocks that are currently assigned to an active file but were previously assigned to an unlinked file, by accessing a stale NFS filehandle.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
XFS - Deleted Inode Local Information Disclosure
OS impact
Linux kernel Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | 2.6.35 |
Ubuntu Affected 4 releases
| Version | Status | Fixed in |
|---|---|---|
| 10.10 | Affected | — |
| 10.04 | Affected | — |
| 9.10 | Affected | — |
| 6.06 | Affected | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| avaya | aura_communication_manager | 5.2 | |
| avaya | aura_presence_services | 6.0 | |
| avaya | aura_presence_services | 6.1 | |
| avaya | aura_presence_services | 6.1.1 | |
| avaya | aura_session_manager | 1.1 | |
| avaya | aura_session_manager | 5.2 | |
| avaya | aura_session_manager | 6.0 | |
| avaya | aura_system_manager | 5.2 | |
| avaya | aura_system_manager | 6.0 | |
| avaya | aura_system_manager | 6.1 | |
| avaya | aura_system_manager | 6.1.1 | |
| avaya | aura_system_platform | 1.1 | |
| avaya | aura_system_platform | 6.0 | |
| avaya | aura_voice_portal | 5.0 | |
| avaya | aura_voice_portal | 5.1 | |
| avaya | iq | 5.0 | |
| avaya | iq | 5.1 | |
References
- http://article.gmane.org/gmane.comp.file-systems.xfs.general/33767
- http://article.gmane.org/gmane.comp.file-systems.xfs.general/33768
- http://article.gmane.org/gmane.comp.file-systems.xfs.general/33769
- http://article.gmane.org/gmane.comp.file-systems.xfs.general/33771
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1920779e67cbf5ea8afef317777c5bf2b8096188
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7124fe0a5b619d65b739477b3b55a20bf805b06d
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7b6259e7a83647948fa33a736cc832310c8d85aa
- http://oss.sgi.com/archives/xfs/2010-06/msg00191.html
- http://oss.sgi.com/archives/xfs/2010-06/msg00198.html
- http://secunia.com/advisories/42758
- http://secunia.com/advisories/43161
- http://secunia.com/advisories/46397
- http://support.avaya.com/css/P8/documents/100113326
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
- http://www.openwall.com/lists/oss-security/2010/08/18/2
- http://www.openwall.com/lists/oss-security/2010/08/19/5
- http://www.redhat.com/support/errata/RHSA-2010-0723.html
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://www.securityfocus.com/bid/42527
- http://www.ubuntu.com/usn/USN-1041-1
- http://www.ubuntu.com/usn/USN-1057-1
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- http://www.vupen.com/english/advisories/2011/0070
- http://www.vupen.com/english/advisories/2011/0280
- https://bugzilla.redhat.com/show_bug.cgi?id=624923
CWEs
CWE-200
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.