CVE-2020-25212

Aliases:UBUNTU-CVE-2020-25212DEBIAN-CVE-2020-25212
Advisory lineage Upstream: 0 Downstream: 51
Modified
Published: 09 Sept 2020, 15:52
Last modified:04 Aug 2024, 15:33

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7 HIGH
v3.1 (nvd)
EPSS Score
0.27% LOW
0% probability +0.19%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

09 Sept 2020, 15:52
Published
Vulnerability first disclosed
04 Aug 2024, 15:33
Last Modified
Vulnerability information updated

Description

A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.

CVSS Metrics

  • v3.1•HIGH•Score: 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 4.4AV:L/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.27%• Percentile: 20%

Techniques & Countermeasures

  • CWE-367•Time-of-check Time-of-use (TOCTOU) Race Condition

    The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 20.04

  • debian•linux

    < 5.7.17-1 | < 5.7.17-1 | < 5.7.17-1 | < 5.7.17-1

  • ubuntu•linux

    all | < 4.4.0-190.220 | < 4.15.0-121.123 | < 5.4.0-48.52

  • ubuntu•linux-aws

    < 4.4.0-1078.82 | < 4.4.0-1114.127 | < 4.15.0-1086.91 | < 5.4.0-1025.25

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1025.25~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2030.31 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1085.90~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1098.109~14.04.1 | < 4.15.0-1098.109~16.04.1 | all | < 5.4.0-1026.26

  • ubuntu•linux-azure-4.15

    < 4.15.0-1099.110

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1026.26~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2012.14 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-fips

    < 4.4.0-1046.51 | all | < 4.15.0-1044.50

  • ubuntu•linux-gcp

    < 4.15.0-1086.98~16.04.1 | all | < 5.4.0-1025.25

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1086.98

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1025.25~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke-4.15

    < 4.15.0-1072.76

  • ubuntu•linux-hwe

    < 4.15.0-120.122~16.04.1 | all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-48.52~18.04.1

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1080.87 | < 4.15.0-1077.79 | < 5.4.0-1024.24

  • ubuntu•linux-lts-xenial

    < 4.4.0-190.220~14.04.1

  • ubuntu•linux-oem

    < 4.15.0-1099.109

  • ubuntu•linux-oem-5.6

    < 5.6.0-1048.52

  • ubuntu•linux-oracle

    < 4.15.0-1056.61~16.04.1 | < 4.15.0-1057.62 | < 5.4.0-1025.25

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1025.25~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1019.21

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1019.21~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1139.148 | < 4.15.0-1073.78 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    < 5.4.0-34.38

  • ubuntu•linux-snapdragon

    < 4.4.0-1143.152 | < 4.15.0-1089.98

  • debian•debian_linux

    9.0

  • linux•linux_kernel

    < 5.8.3

  • opensuse•leap

    15.1 | 15.2

References (20)