CVE-2023-6040: An out-of-bounds access vulnerability involving netfilter was reported and fixed as: f1082dd31fe4 (netfilter: nf_tables: Reject tables of unsupported family)
First published: Fri Jan 12 2024(Updated: )
An out-of-bounds access vulnerability involving netfilter was reported and fixed as: f1082dd31fe4 (netfilter: nf_tables: Reject tables of unsupported family); While creating a new netfilter table, lack of a safeguard against invalid nf_tables family (pf) values within `nf_tables_newtable` function enables an attacker to achieve out-of-bounds access.
Credit: security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.18 | 5.18 |
| Linux Linux kernel | <=5.17 | |
| ubuntu/linux | <5.4.0-170.188 | 5.4.0-170.188 |
| ubuntu/linux | <5.15.0-92.102 | 5.15.0-92.102 |
| ubuntu/linux | <5.18~ | 5.18~ |
| ubuntu/linux-aws | <5.4.0-1117.127 | 5.4.0-1117.127 |
| ubuntu/linux-aws | <5.15.0-1052.57 | 5.15.0-1052.57 |
| ubuntu/linux-aws | <5.18~ | 5.18~ |
| ubuntu/linux-aws-5.15 | <5.15.0-1052.57~20.04.1 | 5.15.0-1052.57~20.04.1 |
| ubuntu/linux-aws-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-aws-5.4 | <5.4.0-1117.127~18.04.1 | 5.4.0-1117.127~18.04.1 |
| ubuntu/linux-aws-5.4 | <5.18~ | 5.18~ |
| ubuntu/linux-aws-6.2 | <5.18~ | 5.18~ |
| ubuntu/linux-aws-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-aws-fips | <5.18~ | 5.18~ |
| ubuntu/linux-aws-hwe | <5.18~ | 5.18~ |
| ubuntu/linux-azure | <5.4.0-1122.129 | 5.4.0-1122.129 |
| ubuntu/linux-azure | <5.15.0-1054.62 | 5.15.0-1054.62 |
| ubuntu/linux-azure | <5.18~ | 5.18~ |
| ubuntu/linux-azure-4.15 | <5.18~ | 5.18~ |
| ubuntu/linux-azure-5.15 | <5.15.0-1054.62~20.04.1 | 5.15.0-1054.62~20.04.1 |
| ubuntu/linux-azure-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-azure-5.4 | <5.4.0-1122.129~18.04.1 | 5.4.0-1122.129~18.04.1 |
| ubuntu/linux-azure-5.4 | <5.18~ | 5.18~ |
| ubuntu/linux-azure-6.2 | <5.18~ | 5.18~ |
| ubuntu/linux-azure-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-azure-fde | <5.15.0-1054.62.1 | 5.15.0-1054.62.1 |
| ubuntu/linux-azure-fde | <5.18~ | 5.18~ |
| ubuntu/linux-azure-fde-5.15 | <5.15.0-1054.62~20.04.1.1 | 5.15.0-1054.62~20.04.1.1 |
| ubuntu/linux-azure-fde-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-azure-fde-6.2 | <5.18~ | 5.18~ |
| ubuntu/linux-azure-fips | <5.18~ | 5.18~ |
| ubuntu/linux-bluefield | <5.4.0-1077.83 | 5.4.0-1077.83 |
| ubuntu/linux-bluefield | <5.15.0-1033.35 | 5.15.0-1033.35 |
| ubuntu/linux-bluefield | <5.18~ | 5.18~ |
| ubuntu/linux-fips | <5.18~ | 5.18~ |
| ubuntu/linux-gcp | <5.4.0-1121.130 | 5.4.0-1121.130 |
| ubuntu/linux-gcp | <5.15.0-1049.57 | 5.15.0-1049.57 |
| ubuntu/linux-gcp | <5.18~ | 5.18~ |
| ubuntu/linux-gcp-4.15 | <5.18~ | 5.18~ |
| ubuntu/linux-gcp-5.15 | <5.15.0-1049.57~20.04.1 | 5.15.0-1049.57~20.04.1 |
| ubuntu/linux-gcp-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-gcp-5.19 | <5.18~ | 5.18~ |
| ubuntu/linux-gcp-5.4 | <5.4.0-1121.130~18.04.1 | 5.4.0-1121.130~18.04.1 |
| ubuntu/linux-gcp-5.4 | <5.18~ | 5.18~ |
| ubuntu/linux-gcp-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-gcp-fips | <5.18~ | 5.18~ |
| ubuntu/linux-gke | <5.15.0-1049.54 | 5.15.0-1049.54 |
| ubuntu/linux-gke | <5.18~ | 5.18~ |
| ubuntu/linux-gkeop | <5.4.0-1084.88 | 5.4.0-1084.88 |
| ubuntu/linux-gkeop | <5.15.0-1035.41 | 5.15.0-1035.41 |
| ubuntu/linux-gkeop | <5.18~ | 5.18~ |
| ubuntu/linux-gkeop-5.15 | <5.15.0-1035.41~20.04.1 | 5.15.0-1035.41~20.04.1 |
| ubuntu/linux-gkeop-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-hwe | <5.18~ | 5.18~ |
| ubuntu/linux-hwe-5.15 | <5.15.0-92.102~20.04.1 | 5.15.0-92.102~20.04.1 |
| ubuntu/linux-hwe-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-hwe-5.4 | <5.4.0-170.188~18.04.1 | 5.4.0-170.188~18.04.1 |
| ubuntu/linux-hwe-5.4 | <5.18~ | 5.18~ |
| ubuntu/linux-hwe-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-ibm | <5.4.0-1064.69 | 5.4.0-1064.69 |
| ubuntu/linux-ibm | <5.15.0-1045.48 | 5.15.0-1045.48 |
| ubuntu/linux-ibm | <5.18~ | 5.18~ |
| ubuntu/linux-ibm-5.15 | <5.15.0-1045.48~20.04.1 | 5.15.0-1045.48~20.04.1 |
| ubuntu/linux-ibm-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-ibm-5.4 | <5.4.0-1064.69~18.04.1 | 5.4.0-1064.69~18.04.1 |
| ubuntu/linux-ibm-5.4 | <5.18~ | 5.18~ |
| ubuntu/linux-intel | <5.18~ | 5.18~ |
| ubuntu/linux-intel-iotg | <5.15.0-1047.53 | 5.15.0-1047.53 |
| ubuntu/linux-intel-iotg | <5.18~ | 5.18~ |
| ubuntu/linux-intel-iotg-5.15 | <5.15.0-1048.54~20.04.1 | 5.15.0-1048.54~20.04.1 |
| ubuntu/linux-intel-iotg-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-iot | <5.4.0-1029.30 | 5.4.0-1029.30 |
| ubuntu/linux-iot | <5.18~ | 5.18~ |
| ubuntu/linux-kvm | <5.4.0-1105.112 | 5.4.0-1105.112 |
| ubuntu/linux-kvm | <5.15.0-1049.54 | 5.15.0-1049.54 |
| ubuntu/linux-kvm | <5.18~ | 5.18~ |
| ubuntu/linux-laptop | <5.18~ | 5.18~ |
| ubuntu/linux-lowlatency | <5.15.0-92.102 | 5.15.0-92.102 |
| ubuntu/linux-lowlatency | <5.18~ | 5.18~ |
| ubuntu/linux-lowlatency-hwe-5.15 | <5.15.0-92.102~20.04.1 | 5.15.0-92.102~20.04.1 |
| ubuntu/linux-lowlatency-hwe-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-lowlatency-hwe-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-lts-xenial | <5.18~ | 5.18~ |
| ubuntu/linux-nvidia | <5.15.0-1043.43 | 5.15.0-1043.43 |
| ubuntu/linux-nvidia | <5.18~ | 5.18~ |
| ubuntu/linux-nvidia-6.2 | <5.18~ | 5.18~ |
| ubuntu/linux-nvidia-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-oem-6.1 | <5.18~ | 5.18~ |
| ubuntu/linux-oem-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-oem-6.8 | <5.18~ | 5.18~ |
| ubuntu/linux-oracle | <5.4.0-1116.125 | 5.4.0-1116.125 |
| ubuntu/linux-oracle | <5.15.0-1050.56 | 5.15.0-1050.56 |
| ubuntu/linux-oracle | <5.18~ | 5.18~ |
| ubuntu/linux-oracle-5.15 | <5.15.0-1050.56~20.04.1 | 5.15.0-1050.56~20.04.1 |
| ubuntu/linux-oracle-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-oracle-5.4 | <5.4.0-1116.125~18.04.1 | 5.4.0-1116.125~18.04.1 |
| ubuntu/linux-oracle-5.4 | <5.18~ | 5.18~ |
| ubuntu/linux-oracle-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-raspi | <5.4.0-1101.113 | 5.4.0-1101.113 |
| ubuntu/linux-raspi | <5.15.0-1045.48 | 5.15.0-1045.48 |
| ubuntu/linux-raspi | <5.18~ | 5.18~ |
| ubuntu/linux-raspi-5.4 | <5.4.0-1101.113~18.04.1 | 5.4.0-1101.113~18.04.1 |
| ubuntu/linux-raspi-5.4 | <5.18~ | 5.18~ |
| ubuntu/linux-riscv | <5.18~ | 5.18~ |
| ubuntu/linux-riscv-5.15 | <5.15.0-1048.52~20.04.1 | 5.15.0-1048.52~20.04.1 |
| ubuntu/linux-riscv-5.15 | <5.18~ | 5.18~ |
| ubuntu/linux-riscv-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-starfive | <5.18~ | 5.18~ |
| ubuntu/linux-starfive-6.5 | <5.18~ | 5.18~ |
| ubuntu/linux-xilinx-zynqmp | <5.4.0-1036.40 | 5.4.0-1036.40 |
| ubuntu/linux-xilinx-zynqmp | <5.15.0-1027.31 | 5.15.0-1027.31 |
| ubuntu/linux-xilinx-zynqmp | <5.18~ | 5.18~ |
| debian/linux | 5.10.218-1 5.10.221-1 6.1.94-1 6.1.99-1 6.9.9-1 6.9.10-1 |
Remedy
If not needed, disable the ability for unprivileged users to create namespaces. To do this temporarily, do: sudo sysctl -w kernel.unprivileged_userns_clone=0 To disable across reboots, do: echo kernel.unprivileged_userns_clone=0 | \ sudo tee /etc/sysctl.d/99-disable-unpriv-userns.conf
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Reference Links
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6040
- https://www.openwall.com/lists/oss-security/2024/01/12/1
- http://www.openwall.com/lists/oss-security/2024/01/12/1
- http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
- https://launchpad.net/bugs/cve/CVE-2023-6040
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f1082dd31fe461d482d69da2a8eccfeb7bf07ac2
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2265572
- https://access.redhat.com/errata/RHSA-2024:2394
- https://bugzilla.redhat.com/show_bug.cgi?id=2258013
- https://ubuntu.com/security/notices/USN-6605-1
- https://ubuntu.com/security/notices/USN-6607-1
- https://ubuntu.com/security/notices/USN-6609-1
- https://ubuntu.com/security/notices/USN-6605-2
- https://ubuntu.com/security/notices/USN-6609-2
- https://ubuntu.com/security/notices/USN-6609-3
- https://ubuntu.com/security/notices/USN-6628-1
- https://ubuntu.com/security/notices/USN-6628-2
- https://www.cve.org/CVERecord?id=CVE-2023-6040
- https://nvd.nist.gov/vuln/detail/CVE-2023-6040
- https://security-tracker.debian.org/tracker/CVE-2023-6040
- https://git.kernel.org/linus/98319cb9089844d76e65a6cce5bfbd165e698735
- https://git.kernel.org/linus/f1082dd31fe461d482d69da2a8eccfeb7bf07ac2
- https://ubuntu.com/security/CVE-2023-6040
- https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Parent vulnerabilities
(Appears in the following advisories)
- collector/oss-sec
- source/oss-sec
- alias/CVE-2023-6040
- agent/weakness
- agent/title
- agent/type
- collector/epss-latest
- source/FIRST
- agent/epss
- agent/first-publish-date
- agent/author
- agent/remedy
- collector/launchpad-cve
- source/Launchpad
- agent/severity
- agent/description
- collector/redhat-bugzilla
- source/Red Hat
- agent/software-canonical-lookup
- collector/nvd-api
- source/NVD
- agent/references
- agent/last-modified-date
- collector/mitre-cve
- source/MITRE
- collector/nvd-cve
- agent/event
- collector/usn-cve
- source/Ubuntu
- agent/softwarecombine
- agent/tags
- collector/security-tracker-debian
- source/Debian
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.17
- package-manager/ubuntu
- package-manager/debian