CVE-2021-38209

Published on: 08/08/2021 12:00:00 AM UTC

Last Modified on: 08/12/2021 10:49:00 PM UTC

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Certain versions of Linux Kernel from Linux contain the following vulnerability:

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.

  • CVE-2021-38209 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as LOW severity.

CVSS3 Score: 3.3 - LOW

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
LOCAL LOW LOW NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED LOW NONE NONE

CVSS2 Score: 2.1 - LOW

Access
Vector
Access
Complexity
Authentication
LOCAL LOW NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL NONE NONE

CVE References

Description Tags Link
netfilter: conntrack: Make global sysctls readonly in non-init netns · torvalds/[email protected] · GitHub github.com
text/html
URL Logo MISC github.com/torvalds/linux/commit/2671fa4dc0109d3fb581bc3078fdf17b5d9080f6
cdn.kernel.org
text/plain
URL Logo MISC cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2

Related QID Numbers

  • 751160 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3179-1)
  • 751170 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3205-1)
  • 900294 CBL-Mariner Linux Security Update for kernel 5.10.52.1
  • 900304 CBL-Mariner Linux Security Update for kernel 5.10.57.1
  • 900319 CBL-Mariner Linux Security Update for kernel 5.10.60.1

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System
LinuxLinux KernelAllAllAllAll
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-38209 : net/netfilter/nf_conntrack_standalone.c in the #Linux #kernel before 5.12.2 allows observation of… twitter.com/i/web/status/1… 2021-08-08 20:06:04
Twitter Icon @LinInfoSec Netfilter - CVE-2021-38209: cdn.kernel.org/pub/linux/kern… 2021-08-08 22:35:33
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