CVE-2017-7979
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.40% probability · 33th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://marc.info/?l=linux-netdev&m=149200742616349Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=linux-netdev&m=149200746116365Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=linux-netdev&m=149200746116366Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=linux-netdev&m=149251041420194Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=linux-netdev&m=149251041420195Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/97969
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682368Issue Tracking, Patch
- https://bugzilla.proxmox.com/show_bug.cgi?id=1351Issue Tracking, Patch
- http://marc.info/?l=linux-netdev&m=149200742616349Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=linux-netdev&m=149200746116365Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=linux-netdev&m=149200746116366Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=linux-netdev&m=149251041420194Mailing List, Patch, Third Party Advisory
- http://marc.info/?l=linux-netdev&m=149251041420195Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/97969
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682368Issue Tracking, Patch
- https://bugzilla.proxmox.com/show_bug.cgi?id=1351Issue Tracking, Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.