User Enumeration Affecting torvalds/linux package, versions [,5.12.2)


Severity

Recommended
0.0
low
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006682
  • published26 Jan 2022
  • disclosed8 Aug 2021
  • creditUnknown

Introduced: 8 Aug 2021

CVE-2021-38209  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.12.2 or higher.

Overview

Affected versions of this package are vulnerable to User Enumeration net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in any net namespace because these changes are leaked into all other net namespaces. This is related to the NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls.

CVSS Scores

version 3.1