CVE-2020-35513

Aliases:UBUNTU-CVE-2020-35513DEBIAN-CVE-2020-35513
Advisory lineage Upstream: 0 Downstream: 4
Modified
Published: 25 Jan 2021, 15:58
Last modified:04 Aug 2024, 17:02

Vulnerability Summary

Overall Risk (default)
low
20/100
CVSS Score
4.9 MEDIUM
v3.1 (nvd)
EPSS Score
1.35% LOW
1% probability +1.03%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Jan 2021, 15:58
Published
Vulnerability first disclosed
04 Aug 2024, 17:02
Last Modified
Vulnerability information updated

Description

A flaw incorrect umask during file or directory modification in the Linux kernel NFS (network file system) functionality was found in the way user create and delete object using NFSv4.2 or newer if both simultaneously accessing the NFS by the other process that is not using new NFSv4.2. A user with access to the NFS could use this flaw to starve the resources causing denial of service.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4AV:N/AC:L/Au:S/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 1.35%• Percentile: 70%

Techniques & Countermeasures

  • CWE-271•Privilege Dropping / Lowering Errors

    The product does not drop privileges before passing control of a resource to an actor that does not have those privileges.

Affected Systems

  • debian•linux

    < 4.16.5-1 | < 4.16.5-1 | < 4.16.5-1 | < 4.16.5-1

  • ubuntu•linux

    all | < 4.15.0-23.25

  • ubuntu•linux-aws

    all | < 4.15.0-1010.10

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-azure

    all | < 4.15.0-1013.13~16.04.2 | all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-gcp

    < 4.15.0-1014.14~16.04.1 | all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-hwe

    < 4.15.0-24.26~16.04.1 | all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-kvm

    < 4.15.0-1011.11

  • ubuntu•linux-lts-xenial

    all

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-raspi2

    < 4.15.0-1012.13 | all

  • ubuntu•linux-riscv

    all

  • linux•linux_kernel

    4.2

  • redhat•enterprise_linux

    7.0

References (6)