Input validation error in Linux kernel - CVE-2011-4112
Published: May 17, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU44081
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2011-4112
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
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.
How to mitigate CVE-2011-4112
Install update from vendor's website.
Sources
- http://downloads.avaya.com/css/P8/documents/100156038
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=550fd08c2cebad61c548def135f67aba284c6162
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
- http://www.openwall.com/lists/oss-security/2011/11/21/4
- https://bugzilla.redhat.com/show_bug.cgi?id=751006
- https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c6162