vulnwire
7.5high

CVE-2017-8797

The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
7.5
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
9.5%
percentile 95%
Public exploits
0
none known

The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This type value is uninitialized upon encountering certain error conditions. This value is used as an array index for dereferencing, which leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system.

Exploit prediction (EPSS)

9.48% probability of exploitation in the next 30 days, higher than 95% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.17.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD2.07.8AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-129 Improper Validation of Array Index
Technology feeds
Linux kernel (RSS, critical only)

References

  • openwall.com /lists/oss-security/2017/06/27/5 · x_refsource_MISC, x_transferred
  • securitytracker.com /id/1038790 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • access.redhat.com /errata/RHSA-2017:2437 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • github.com /torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf79 · x_refsource_MISC, x_transferred
  • access.redhat.com /errata/RHSA-2017:2669 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • bugzilla.redhat.com /show_bug.cgi?id=1466329 · x_refsource_MISC, x_transferred
  • git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3f2acae94b727380c0b74e2d3954d0ed · x_refsource_MISC, x_transferred
  • github.com /torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235a5 · x_refsource_MISC, x_transferred
  • access.redhat.com /errata/RHSA-2017:2077 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • kernel.org /pub/linux/kernel/v4.x/ChangeLog-4.11.3 · x_refsource_MISC, x_transferred
  • access.redhat.com /errata/RHSA-2017:1842 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • securityfocus.com /bid/99298 · vdb-entry, x_refsource_BID, x_transferred
  • git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a32e60a4941994b437a8d662432a48623 · x_refsource_MISC, x_transferred

Sources

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