CVE-2021-4037

A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group. This can lead to excessive permissions granted in case when they should not. This vulnerability is similar to the previous CVE-2018-13405 and adds the missed fix for the XFS.

CVSS v3.0 7.8 HIGH

7.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=2027239	Issue Tracking Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01ea173e103e	Mailing List Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848	Mailing List Patch Vendor Advisory
https://access.redhat.com/security/cve/CVE-2021-4037	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2004810	Issue Tracking Permissions Required Third Party Advisory
https://www.debian.org/security/2022/dsa-5257	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html	Mailing List Third Party Advisory

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:10.0:::::::*
	cpe:2.3:o:debian:debian_linux:11.0:::::::*

Information

Published : 2022-08-24 09:15

Updated : 2022-12-07 19:40

NVD link : CVE-2021-4037

Mitre link : CVE-2021-4037

JSON object : View

CWE

CWE-284

Improper Access Control

Advertisement

Products Affected

debian

debian_linux

linux

linux_kernel

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2027239", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2027239", "tags": ["Issue Tracking", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01ea173e103e", "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01ea173e103e", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "refsource": "MISC"}, {"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848", "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "refsource": "MISC"}, {"url": "https://access.redhat.com/security/cve/CVE-2021-4037", "name": "https://access.redhat.com/security/cve/CVE-2021-4037", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2004810", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2004810", "tags": ["Issue Tracking", "Permissions Required", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://www.debian.org/security/2022/dsa-5257", "name": "DSA-5257", "tags": ["Third Party Advisory"], "refsource": "DEBIAN"}, {"url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html", "name": "[debian-lts-announce] 20221101 [SECURITY] [DLA 3173-1] linux-5.10 security update", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group. This can lead to excessive permissions granted in case when they should not. This vulnerability is similar to the previous CVE-2018-13405 and adds the missed fix for the XFS."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-284"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-4037", "ASSIGNER": "secalert@redhat.com"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}}, "publishedDate": "2022-08-24T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.11"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-12-08T03:40Z"}