CVE-2017-7979

high

Description

The cookie feature in the packet action API implementation in net/sched/act_api.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service (uninitialized memory access and refcount underflow, and system hang or crash) or possibly have unspecified other impact via "tc filter add" commands in certain contexts. NOTE: this does not affect stable kernels, such as 4.10.x, from kernel.org.

References

http://marc.info/?l=linux-netdev&m=149200742616349

http://marc.info/?l=linux-netdev&m=149200746116365

http://marc.info/?l=linux-netdev&m=149200746116366

http://marc.info/?l=linux-netdev&m=149251041420194

http://marc.info/?l=linux-netdev&m=149251041420195

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682368

Details

Source: Mitre, NVD

Published: 2017-04-19

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High