CVE-2017-8797

Advisory lineage Upstream: 0 Downstream: 16
Modified
Published: 02 Jul 2017, 17:00
Last modified:05 Aug 2024, 16:48

Vulnerability Summary

Overall Risk (default)
medium
37/100
CVSS Score
7.8 HIGH
v2.0 (nvd)
EPSS Score
30.42% HIGH
30% probability -1.37%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

02 Jul 2017, 17:00
Published
Vulnerability first disclosed
05 Aug 2024, 16:48
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•HIGH•Score: 7.8AV:N/AC:L/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 30.42%• Percentile: 97%

Techniques & Countermeasures

  • CWE-129•Improper Validation of Array Index

    The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

Affected Systems

  • linux•linux_kernel

    ≥ 4.0, < 4.1.40 | ≥ 4.2, < 4.4.70 | ≥ 4.5, < 4.9.30 | ≥ 4.11, < 4.11.3

References (13)