Vulnerability Name:

CVE-2021-38209 (CCN-207016)

Assigned:2021-04-12
Published:2021-04-12
Updated:2021-08-12
Summary: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 v3 Severity:3.3 Low (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
2.9 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
3.5 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-203
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-38209

Source: MISC
Type: Mailing List, Patch, Vendor Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2

Source: XF
Type: UNKNOWN
linux-kernel-cve202138209-info-disc(207016)

Source: CCN
Type: Linux Kernel GIT Repository
netfilter: conntrack: Make global sysctls readonly in non-init netns

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/2671fa4dc0109d3fb581bc3078fdf17b5d9080f6

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version < 5.12.2)

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:5.12:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:8029
    P
    		kernel-docs-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-20
    oval:org.opensuse.security:def:7539
    P
    		kernel-64kb-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:7588
    P
    		libekmfweb1-2.25.0-150500.7.3 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:8090
    P
    		reiserfs-kmp-default-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:780
    P
    		Security update for snakeyaml (Important)
    2022-09-26
    oval:org.opensuse.security:def:3681
    P
    		Security update for fwupd (Important)
    2022-07-07
    oval:org.opensuse.security:def:3567
    P
    		libXtst6-1.2.2-7.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3398
    P
    		wpa_supplicant-2.6-15.10.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3448
    P
    		busybox-1.21.1-3.3 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3453
    P
    		clamav-0.101.3-1.19 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:95078
    P
    		reiserfs-kmp-default-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95083
    P
    		kernel-azure-5.14.21-150400.12.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94590
    P
    		kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95197
    P
    		kernel-default-extra-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95028
    P
    		kernel-docs-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:2960
    P
    		kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:4576
    P
    		Security update for the Linux Kernel (Live Patch 19 for SLE 12 SP5) (Important)
    2022-04-15
    oval:org.opensuse.security:def:6182
    P
    		Security update for zsh (Important)
    2022-03-04
    oval:org.opensuse.security:def:6178
    P
    		Security update for webkit2gtk3 (Important)
    2022-03-03
    oval:org.opensuse.security:def:42222
    P
    		Security update for the Linux Kernel (Important)
    2021-10-13
    oval:org.opensuse.security:def:76339
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:7270
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:101921
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:99680
    P
    		 (Important)
    2021-09-23
    oval:org.opensuse.security:def:67271
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:73892
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:1125
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:101511
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:70836
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:64770
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:1737
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:111726
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:102295
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:99995
    P
    		 (Important)
    2021-09-23
    oval:org.opensuse.security:def:67569
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:74733
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:1218
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:101803
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:99145
    P
    		 (Important)
    2021-09-23
    oval:org.opensuse.security:def:65665
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:8393
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:1781
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:102333
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:100331
    P
    		 (Important)
    2021-09-23
    oval:org.opensuse.security:def:68359
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:6480
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:1268
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:101878
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:99417
    P
    		 (Important)
    2021-09-23
    oval:org.opensuse.security:def:10696
    P
    		Security update for the Linux Kernel (Important)
    2021-09-23
    oval:org.opensuse.security:def:100660
    P
    		 (Important)
    2021-09-23
    oval:org.opensuse.security:def:68677
    P
    		Security update for the Linux Kernel (Important)
    2021-09-21
    oval:org.opensuse.security:def:1550
    P
    		Security update for the Linux Kernel (Important)
    2021-09-21
    oval:org.opensuse.security:def:111720
    P
    		Security update for the Linux Kernel (Important)
    2021-09-21
    oval:org.opensuse.security:def:76335
    P
    		Security update for the Linux Kernel (Important)
    2021-09-21
    oval:org.opensuse.security:def:67267
    P
    		Security update for the Linux Kernel (Important)
    2021-09-21
    BACK
    linux linux kernel *
    linux linux kernel 5.12 -