Kernel: netfilter: xtables out-of-bounds read in u32_match_it()

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Summary

CVECVE-2023-39192
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-10-09 18:15:10 UTC
Updated2026-10-15 00:16:35 UTC
DescriptionA flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure.

Risk And Classification

Primary CVSS: v3.1 6 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

Problem Types: CWE-125 | CWE-125 Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
3.1[email protected]Secondary6.7MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L
3.1CNACVSS6.7MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 38 All All All
Operating System Linux Linux Kernel All All All All
Operating System Redhat Enterprise Linux 8.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:4.18.0-553.rt7.342.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:4.18.0-553.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected V1.1 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
ZDI-23-1490 | Zero Day Initiative af854a3a-2127-422b-91ae-364da2661108 www.zerodayinitiative.com Third Party Advisory, VDB Entry
2226784 – (CVE-2023-39192, ZDI-CAN-18408) CVE-2023-39192 kernel: netfilter: xtables out-of-bounds read in u32_match_it() af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch, Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-769027.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
access.redhat.com/errata/RHSA-2024:3138 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
access.redhat.com/errata/RHSA-2024:2950 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
cert-portal.siemens.com/productcert/html/ssa-794697.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
cve-details af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
lists.debian.org/debian-lts-announce/2024/01/msg00004.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2023-07-25T00:00:00.000ZReported to Red Hat.
CNA2023-09-29T00:00:00.000ZMade public.

Workarounds

CNA: This flaw can be mitigated by preventing the affected `xt_u32` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.

Legacy QID Mappings

  • 161211 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2023-13019)
  • 199936 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6494-1)
  • 199970 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6494-2)
  • 199976 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6534-1)
  • 199979 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6532-1)
  • 199996 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6549-1)
  • 199997 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6548-1)
  • 199999 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6548-2)
  • 200002 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6534-2)
  • 200003 Ubuntu Security Notification for Linux kernel (GKE) Vulnerabilities (USN-6549-2)
  • 200006 Ubuntu Security Notification for Linux kernel (Oracle) Vulnerabilities (USN-6548-3)
  • 200007 Ubuntu Security Notification for Linux kernel (Low Latency) Vulnerabilities (USN-6549-3)
  • 200010 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6534-3)
  • 200024 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6549-4)
  • 200035 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6549-5)
  • 200037 Ubuntu Security Notification for Linux kernel (IoT) Vulnerabilities (USN-6548-5)
  • 200113 Ubuntu Security Notification for Linux kernel (GCP) Vulnerabilities (USN-6635-1)
  • 356357 Amazon Linux Security Advisory for kernel : ALAS-2023-1838
  • 356371 Amazon Linux Security Advisory for kernel : ALAS2023-2023-356
  • 356409 Amazon Linux Security Advisory for kernel : ALAS2-2023-2264
  • 356567 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.15-2023-027
  • 356572 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2023-040
  • 356606 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2023-053
  • 379435 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX2-SA-2024:0012)
  • 379614 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2024:0017)
  • 390293 Oracle Managed Virtualization (VM) Server for x86 Security Update for kernel (OVMSA-2023-0025)
  • 6000429 Debian Security Update for linux (DLA 3710-1)
  • 6140314 AWS Bottlerocket Security Update for kernel (GHSA-7fvv-59hh-g6m7)
  • 673534 EulerOS Security Update for kernel (EulerOS-SA-2024-1086)
  • 673563 EulerOS Security Update for kernel (EulerOS-SA-2024-1144)
  • 673595 EulerOS Security Update for kernel (EulerOS-SA-2023-3247)
  • 673692 EulerOS Security Update for kernel (EulerOS-SA-2023-3275)
  • 673923 EulerOS Security Update for kernel (EulerOS-SA-2024-1062)
  • 673995 EulerOS Security Update for kernel (EulerOS-SA-2024-1275)
  • 674042 EulerOS Security Update for kernel (EulerOS-SA-2023-3304)
  • 755059 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4035-1)
  • 755060 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4031-1)
  • 755063 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4032-1)
  • 755082 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4058-1)
  • 755083 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4057-1)
  • 755085 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4072-1)
  • 755086 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4071-1)
  • 755096 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4093-1)
  • 755229 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4072-2)
  • 755235 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4377-1)
  • 755564 SUSE Security Update for the linux kernel (SUSE-SU-2023:4348-1)
  • 755565 SUSE Security Update for the linux kernel (SUSE-SU-2023:4347-1)
  • 907450 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (31266)
  • 907583 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (31266-1)

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