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Vulnerability details: VCID-pt4c-1gws-aaar
Vulnerability ID VCID-pt4c-1gws-aaar
Aliases CVE-2021-20206
GHSA-xjqr-g762-pxwp
Summary An improper limitation of path name flaw was found in containernetworking/cni in versions before 0.8.1. When specifying the plugin to load in the 'type' field in the network configuration, it is possible to use special elements such as "../" separators to reference binaries elsewhere on the system. This flaw allows an attacker to execute other existing binaries other than the cni plugins/types, such as 'reboot'. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-20 Improper Input Validation
System Score Found at
rhas Moderate https://access.redhat.com/errata/RHSA-2021:0799
rhas Moderate https://access.redhat.com/errata/RHSA-2021:1005
rhas Moderate https://access.redhat.com/errata/RHSA-2021:1007
rhas Moderate https://access.redhat.com/errata/RHSA-2021:1552
rhas Moderate https://access.redhat.com/errata/RHSA-2021:2438
rhas Moderate https://access.redhat.com/errata/RHSA-2021:3001
rhas Moderate https://access.redhat.com/errata/RHSA-2022:0492
rhas Moderate https://access.redhat.com/errata/RHSA-2022:1660
cvssv3 7.2 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20206.json
epss 0.00123 https://api.first.org/data/v1/epss?cve=CVE-2021-20206
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epss 0.00562 https://api.first.org/data/v1/epss?cve=CVE-2021-20206
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1919391
cvssv3.1 7.2 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.2 https://github.com/containernetworking/cni
generic_textual HIGH https://github.com/containernetworking/cni
cvssv3.1 7.2 https://github.com/containernetworking/cni/pull/808
generic_textual HIGH https://github.com/containernetworking/cni/pull/808
cvssv2 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-20206
cvssv3 7.2 https://nvd.nist.gov/vuln/detail/CVE-2021-20206
cvssv3.1 7.2 https://nvd.nist.gov/vuln/detail/CVE-2021-20206
cvssv3.1 7.2 https://pkg.go.dev/vuln/GO-2022-0230
generic_textual HIGH https://pkg.go.dev/vuln/GO-2022-0230
cvssv3.1 7.2 https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMCONTAINERNETWORKINGCNIPKGINVOKE-1070549
generic_textual HIGH https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMCONTAINERNETWORKINGCNIPKGINVOKE-1070549
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20206.json
https://api.first.org/data/v1/epss?cve=CVE-2021-20206
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20206
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/containernetworking/cni
https://github.com/containernetworking/cni/pull/808
https://pkg.go.dev/vuln/GO-2022-0230
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMCONTAINERNETWORKINGCNIPKGINVOKE-1070549
1919391 https://bugzilla.redhat.com/show_bug.cgi?id=1919391
983659 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=983659
cpe:2.3:a:linuxfoundation:container_network_interface:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:linuxfoundation:container_network_interface:*:*:*:*:*:*:*:*
CVE-2021-20206 https://nvd.nist.gov/vuln/detail/CVE-2021-20206
RHSA-2021:0799 https://access.redhat.com/errata/RHSA-2021:0799
RHSA-2021:1005 https://access.redhat.com/errata/RHSA-2021:1005
RHSA-2021:1007 https://access.redhat.com/errata/RHSA-2021:1007
RHSA-2021:1552 https://access.redhat.com/errata/RHSA-2021:1552
RHSA-2021:2438 https://access.redhat.com/errata/RHSA-2021:2438
RHSA-2021:3001 https://access.redhat.com/errata/RHSA-2021:3001
RHSA-2022:0492 https://access.redhat.com/errata/RHSA-2022:0492
RHSA-2022:1660 https://access.redhat.com/errata/RHSA-2022:1660
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20206.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/containernetworking/cni
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/containernetworking/cni/pull/808
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20206
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20206
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20206
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://pkg.go.dev/vuln/GO-2022-0230
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Found at https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMCONTAINERNETWORKINGCNIPKGINVOKE-1070549
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.47707
EPSS Score 0.00123
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.