Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 3.1 |
| Avaya | 9608 Firmware | >= 6.0, <= 6.6.0 |
| Avaya | 9608 | - |
| Avaya | 9608G Firmware | >= 6.0, <= 6.6.0 |
| Avaya | 9608G | - |
| Avaya | 9611G Firmware | >= 6.0, <= 6.6.0 |
| Avaya | 9611G | - |
| Avaya | 9621G Firmware | >= 6.0, <= 6.6.0 |
| Avaya | 9621G | - |
| Avaya | 9641G Firmware | >= 6.0, <= 6.6.0 |
| Avaya | 9641G | - |
| Avaya | 9641Gs Firmware | >= 6.0, <= 6.6.0 |
| Avaya | 9641Gs | - |
References
- http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1Mailing ListPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2011/11/21/4Mailing ListPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=751006ExploitIssue TrackingPatch
- https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c616PatchThird Party Advisory
- http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1Mailing ListPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2011/11/21/4Mailing ListPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=751006ExploitIssue TrackingPatch
- https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c616PatchThird Party Advisory
FAQ
What is CVE-2011-4112?
CVE-2011-4112 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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_...
How severe is CVE-2011-4112?
CVE-2011-4112 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2011-4112?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Avaya 9608 Firmware, Avaya 9608, Avaya 9608G Firmware, Avaya 9608G.