CVE-2011-4112 - Cystoid Hare

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 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1 https://bugzilla.redhat.com/show_bug.cgi?id=751006 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=550fd08c2cebad61c548def135f67aba284c6162 http://www.openwall.com/lists/oss-security/2011/11/21/4 https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c6162 http://downloads.avaya.com/css/P8/documents/100156038

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5