CVE-2021-4203

Published on: Not Yet Published

Last Modified on: 12/08/2022 10:19:00 PM UTC

CVE-2021-4203

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

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

A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.

  • CVE-2021-4203 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.

CVSS3 Score: 6.8 - MEDIUM

Attack
Vector ⓘ		 Attack
Complexity		 Privileges
Required		 User
Interaction
NETWORK HIGH LOW NONE
Scope Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
UNCHANGED HIGH NONE HIGH

CVSS2 Score: 4.9 - MEDIUM

Access
Vector ⓘ		 Access
Complexity		 Authentication
NETWORK MEDIUM SINGLE
Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
PARTIAL NONE PARTIAL

CVE References

Description Tags ⓘ Link
kernel/git/netdev/net.git - Netdev Group's networking tree git.kernel.org
text/html
 URL Logo MISC git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=35306eb23814
[PATCH net] af_unix: fix races in sk_peer_pid and sk_peer_cred accesses lore.kernel.org
text/html
 URL Logo MISC lore.kernel.org/netdev/[email protected]/T/
CVE-2021-4203 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security security.netapp.com
text/html
 URL Logo CONFIRM security.netapp.com/advisory/ntap-20221111-0003/
2230 - project-zero - Project Zero - Monorail bugs.chromium.org
text/html
 URL Logo MISC bugs.chromium.org/p/project-zero/issues/detail?id=2230&can=7&q=modified-after%3Atoday-30&sort=-modified&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20Modified%20Cve&cells=tiles&redir=1
2036934 – (CVE-2021-4203) CVE-2021-4203 kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses bugzilla.redhat.com
text/html
 URL Logo MISC bugzilla.redhat.com/show_bug.cgi?id=2036934
Oracle Critical Patch Update Advisory - July 2022 www.oracle.com
text/html
 URL Logo MISC www.oracle.com/security-alerts/cpujul2022.html
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Related QID Numbers

  • 159777 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2022-9348)
  • 159825 Oracle Enterprise Linux Security Update for kernel (ELSA-2022-1988)
  • 179117 Debian Security Update for linux (DSA 5096-1)
  • 179119 Debian Security Update for linux-4.19 (DLA 2941-1)
  • 179819 Debian Security Update for linux (CVE-2021-4203)
  • 240275 Red Hat Update for kernel-rt (RHSA-2022:1975)
  • 240298 Red Hat Update for kernel security (RHSA-2022:1988)
  • 240544 Red Hat Update for kernel-rt (RHSA-2022:5633)
  • 240545 Red Hat Update for kernel (RHSA-2022:5626)
  • 353242 Amazon Linux Security Advisory for kernel : ALAC2012-2022-036
  • 353243 Amazon Linux Security Advisory for kmod-mlx5 : ALAC2012-2022-037
  • 353244 Amazon Linux Security Advisory for kmod-sfc : ALAC2012-2022-038
  • 377053 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX2-SA-2022:0028)
  • 390261 Oracle Managed Virtualization (VM) Server for x86 Security Update for kernel (OVMSA-2022-0014)
  • 671448 EulerOS Security Update for kernel (EulerOS-SA-2022-1450)
  • 671474 EulerOS Security Update for kernel (EulerOS-SA-2022-1429)
  • 671505 EulerOS Security Update for kernel (EulerOS-SA-2022-1489)
  • 671535 EulerOS Security Update for kernel (EulerOS-SA-2022-1508)
  • 671862 EulerOS Security Update for kernel (EulerOS-SA-2022-1896)
  • 752584 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3265-1)
  • 752589 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3264-1)
  • 752591 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3274-1)
  • 752592 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3282-1)
  • 752596 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3291-1)
  • 752615 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3408-1)
  • 752632 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3450-1)
  • 753370 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3609-1)
  • 753374 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:3809-1)
  • 753745 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0634-1)
  • 753807 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0768-1)
  • 753832 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0852-1)
  • 753914 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:1848-1)
  • 754023 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:2232-1)
  • 900806 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (9266)
  • 901305 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (9266-1)
  • 906130 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (9266-2)
  • 940517 AlmaLinux Security Update for kernel (ALSA-2022:1988)

Exploit/POC from Github

This repository contains a collection of data files on known Common Vulnerabilities and Exposures (CVEs). Each file i…

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationLinuxLinux KernelAllAllAllAll
ApplicationLinuxLinux Kernel5.15-AllAll
ApplicationLinuxLinux Kernel5.15rc1AllAll
ApplicationLinuxLinux Kernel5.15rc2AllAll
ApplicationLinuxLinux Kernel5.15rc3AllAll
Operating
System		LinuxLinux KernelAllAllAllAll
Operating
System		LinuxLinux Kernel5.15-AllAll
Operating
System		LinuxLinux Kernel5.15rc1AllAll
Operating
System		LinuxLinux Kernel5.15rc2AllAll
Operating
System		LinuxLinux Kernel5.15rc3AllAll
Hardware Device InfoNetappA700s-AllAllAll
Operating
System		NetappA700s Firmware-AllAllAll
ApplicationNetappActive Iq Unified Manager-AllAllAll
Operating
System		NetappBootstrap Os-AllAllAll
ApplicationNetappE-series Santricity Os ControllerAllAllAllAll
ApplicationNetappElement Software-AllAllAll
Hardware Device InfoNetappH300s-AllAllAll
Operating
System		NetappH300s Firmware-AllAllAll
Hardware Device InfoNetappH410c-AllAllAll
Operating
System		NetappH410c Firmware-AllAllAll
Hardware Device InfoNetappH410s-AllAllAll
Operating
System		NetappH410s Firmware-AllAllAll
Hardware Device InfoNetappH500s-AllAllAll
Operating
System		NetappH500s Firmware-AllAllAll
Hardware Device InfoNetappH700s-AllAllAll
Operating
System		NetappH700s Firmware-AllAllAll
Hardware Device InfoNetappHci Compute Node-AllAllAll
ApplicationNetappHci Management Node-AllAllAll
ApplicationNetappSolidfire-AllAllAll
ApplicationOracleCommunications Cloud Native Core Binding Support Function22.1.3AllAllAll
ApplicationOracleCommunications Cloud Native Core Network Exposure Function22.1.1AllAllAll
ApplicationOracleCommunications Cloud Native Core Policy22.2.0AllAllAll
  • cpe:2.3:a:linux:linux_kernel:*:*:*:*:*:*:*:*:
  • cpe:2.3:a:linux:linux_kernel:5.15:-:*:*:*:*:*:*:
  • cpe:2.3:a:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*:
  • cpe:2.3:a:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*:
  • cpe:2.3:a:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*:
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*:
  • cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:*:
  • cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*:
  • cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*:
  • cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*:
  • cpe:2.3:h:netapp:a700s:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:netapp:a700s_firmware:-:*:*:*:*:*:*:*:
  • cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*:
  • cpe:2.3:o:netapp:bootstrap_os:-:*:*:*:*:*:*:*:
  • cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*:
  • cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*:
  • cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*:
  • cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*:
  • cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*:
  • cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*:
  • cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:*:
  • cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @softek_jp Linux Kernel の UNIX ドメインソケットの処理に特権を奪われる問題 (CVE-2021-4203) [41563] sid.softek.jp/content/show/4… #SIDfm #脆弱性情報 2022-03-11 06:00:05
Twitter Icon @CVEreport CVE-2021-4203 : A use-after-free read flaw was found in sock_getsockopt in net/core/sock.c due to SO_PEERCRED and… twitter.com/i/web/status/1… 2022-03-25 19:13:37
Reddit Logo Icon /r/netcve CVE-2021-4203 2022-03-25 20:38:40
Reddit Logo Icon /r/synology DSM Version: 7.1.1-42951 (Release Candidate) 2022-08-10 06:07:14
Reddit Logo Icon /r/synology Has anyone seen the release notes for the latest DSM 7.1.1 Release Candidate. Fixes a scary amount of CVEs. 2022-08-16 14:26:29
Reddit Logo Icon /r/synology DSM 7.1.1-42962 released! 2022-09-05 11:39:36
Reddit Logo Icon /r/asustor ADM 4.1.0.RLQ1 update available (2022-09-28) 2022-10-08 04:00:04
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