CVE-2011-2189
Description
net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.
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
Linux Kernel 2.6.35 - Network Namespace Remote Denial of Service
OS impact
Linux kernel Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Red Hat Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| 6.0 | Affected | — |
Ubuntu Affected 4 releases
| Version | Status | Fixed in |
|---|---|---|
| 11.10 | Affected | — |
| 11.04 | Affected | — |
| 10.10 | Affected | — |
| 10.04 | Affected | — |
Debian Mixed 8 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2.3.4-1 |
| sid | Fixed | 2.3.4-1 |
| forky | Fixed | 2.3.4-1 |
| bullseye | Fixed | 2.3.4-1 |
| bookworm | Fixed | 2.3.4-1 |
| 7.0 | Affected | — |
| 6.0 | Affected | — |
| 5.0 | Affected | — |
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b035b39970740722598f7a9d548835f9bdd730f
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f875bae065334907796da12523f9df85c89f5712
- http://ie.archive.ubuntu.com/linux/kernel/v2.6/ChangeLog-2.6.33
- http://kerneltrap.org/mailarchive/git-commits-head/2009/12/8/15289
- http://neil.brown.name/git?p=linux-2.6%3Ba=patch%3Bh=2b035b39970740722598f7a9d548835f9bdd730f
- http://patchwork.ozlabs.org/patch/88217/
- http://www.debian.org/security/2011/dsa-2305
- http://www.openwall.com/lists/oss-security/2011/06/06/10
- http://www.openwall.com/lists/oss-security/2011/06/06/20
- http://www.ubuntu.com/usn/USN-1288-1
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/720095
- https://bugzilla.redhat.com/show_bug.cgi?id=711134
- https://bugzilla.redhat.com/show_bug.cgi?id=711245
- https://security-tracker.debian.org/tracker/CVE-2011-2189
CWEs
CWE-400
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.