CVE-2021-4037— Kernel: security regression for cve-2018-13405
Quick assessment
Affected
Linux kernel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
Possible ATT&CK Techniques 1 AI
T1222.001 · Windows PermissionsAffected Version Matrix 11
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | kernel | *< 5.4.241 |
affected |
5.5< 5.10.146 |
affected | ||
5.12 |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 6 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 7 | any |
unaffected |
any |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8 | 0:4.18.0-372.9.1.rt7.166.el8< * |
unaffected |
0:4.18.0-372.9.1.el8< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support | 0:4.18.0-305.49.1.rt7.121.el8_4< * |
unaffected |
0:4.18.0-305.49.1.el8_4< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9 | any |
unaffected |
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I. Basic Information for CVE-2021-4037
Vulnerability Information
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Vulnerability Title
Kernel: security regression for cve-2018-13405
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Linux | kernel | * ~ 5.4.241 | - |
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:4.18.0-372.9.1.rt7.166.el8 ~ * |
cpe:/a:redhat:enterprise_linux:8::nfv
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:4.18.0-372.9.1.el8 ~ * |
cpe:/a:redhat:enterprise_linux:8::crb
|
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support | 0:4.18.0-305.49.1.rt7.121.el8_4 ~ * |
cpe:/a:redhat:rhel_eus:8.4::nfv
|
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support | 0:4.18.0-305.49.1.el8_4 ~ * |
cpe:/a:redhat:rhel_eus:8.4::crb
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
II. Public POCs for CVE-2021-4037
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Patches & Fixes for CVE-2021-4037 (2)
Vendor Advisories for CVE-2021-4037 (7)
-
https://www.debian.org/security/2022/dsa-5257 vendor-advisory
-
🔗 RHSA-2022:4835 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
-
🔗 RHSA-2022:1988 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2022:1975 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Mailing List Discussions for CVE-2021-4037 (1)
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Same weakness: CWE-284
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V. Comments for CVE-2021-4037
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