CVE-2011-4112 Denial of service in n/a
Local users with CAP_NET_ADMIN can cause a kernel panic via the pktgen package and bridge devices, requiring a kernel upgrade.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2011-4112?
CVE-2011-4112 is a medium-severity denial of service vulnerability in Linux kernel, published on 17 May 2012. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The net subsystem in the Linux kernel before 3.1 does not properly restrict use of the IFF_TX_SKB_SHARING flag, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability to access /proc/net/pktgen/pgctrl, and then using the pktgen package in conjunction with a bridge device for a VLAN interface.
Which versions are affected by CVE-2011-4112?
It affects 7 products.
Products include Avaya 9608 Firmware, Avaya 9608g Firmware, Avaya 9611g Firmware, Avaya 9621g Firmware, Avaya 9641g Firmware, Avaya 9641gs Firmware and 1 more.
How do I fix CVE-2011-4112?
No fix has been published for CVE-2011-4112 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2011-4112 being exploited?
There is no known exploitation of CVE-2011-4112 in the wild and no public exploit code.
Sources
Also known as GHSA-xhfj-c879-xq4w.