vulnwire
7.8high

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 th…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
7.8
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
0.4%
percentile 34%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

0.40% probability of exploitation in the next 30 days, higher than 34% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD2.07.2AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds
Linux kernel (RSS, critical only)

References

  • marc.info /?l=linux-netdev&m=149251041420195 · x_refsource_MISC, x_transferred
  • bugs.launchpad.net /ubuntu/+source/linux/+bug/1682368 · x_refsource_MISC, x_transferred
  • bugzilla.proxmox.com /show_bug.cgi?id=1351 · x_refsource_MISC, x_transferred
  • marc.info /?l=linux-netdev&m=149200742616349 · x_refsource_MISC, x_transferred
  • marc.info /?l=linux-netdev&m=149200746116365 · x_refsource_MISC, x_transferred
  • marc.info /?l=linux-netdev&m=149251041420194 · x_refsource_MISC, x_transferred
  • marc.info /?l=linux-netdev&m=149200746116366 · x_refsource_MISC, x_transferred
  • securityfocus.com /bid/97969 · vdb-entry, x_refsource_BID, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.