CVE-2023-32629
First published: Tue Jun 06 2023(Updated: )
Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels
Credit: security@ubuntu.com security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical Ubuntu Linux | =23.04 | |
| ubuntu/linux | <5.4.0-155.172 | 5.4.0-155.172 |
| ubuntu/linux | <6.2.0-26.26 | 6.2.0-26.26 |
| ubuntu/linux-aws | <5.4.0-1106.114 | 5.4.0-1106.114 |
| ubuntu/linux-aws | <6.2.0-1008.8 | 6.2.0-1008.8 |
| ubuntu/linux-aws-5.19 | <5.19.0-1029.30~22.04.1 | 5.19.0-1029.30~22.04.1 |
| ubuntu/linux-aws-5.4 | <5.4.0-1106.114~18.04.1 | 5.4.0-1106.114~18.04.1 |
| ubuntu/linux-aws-6.2 | <6.2.0-1008.8~22.04.1 | 6.2.0-1008.8~22.04.1 |
| ubuntu/linux-azure | <5.4.0-1112.118 | 5.4.0-1112.118 |
| ubuntu/linux-azure | <6.2.0-1008.8 | 6.2.0-1008.8 |
| ubuntu/linux-azure-5.4 | <5.4.0-1112.118~18.04.1 | 5.4.0-1112.118~18.04.1 |
| ubuntu/linux-azure-6.2 | <6.2.0-1008.8~22.04.1 | 6.2.0-1008.8~22.04.1 |
| ubuntu/linux-azure-fde | <5.4.0-1112.118 | 5.4.0-1112.118 |
| ubuntu/linux-azure-fde-6.2 | <6.2.0-1008.8~22.04.1 | 6.2.0-1008.8~22.04.1 |
| ubuntu/linux-bluefield | <5.4.0-1068.74 | 5.4.0-1068.74 |
| ubuntu/linux-gcp | <5.4.0-1109.118 | 5.4.0-1109.118 |
| ubuntu/linux-gcp | <6.2.0-1010.10 | 6.2.0-1010.10 |
| ubuntu/linux-gcp-5.19 | <5.19.0-1030.32~22.04.1 | 5.19.0-1030.32~22.04.1 |
| ubuntu/linux-gcp-5.4 | <5.4.0-1109.118~18.04.1 | 5.4.0-1109.118~18.04.1 |
| ubuntu/linux-gcp-6.2 | <6.2.0-1010.10~22.04.1 | 6.2.0-1010.10~22.04.1 |
| ubuntu/linux-gke | <5.4.0-1104.111 | 5.4.0-1104.111 |
| ubuntu/linux-gkeop | <5.4.0-1073.77 | 5.4.0-1073.77 |
| ubuntu/linux-hwe-5.19 | <5.19.0-50.50 | 5.19.0-50.50 |
| ubuntu/linux-hwe-5.4 | <5.4.0-155.172~18.04.1 | 5.4.0-155.172~18.04.1 |
| ubuntu/linux-hwe-6.2 | <6.2.0-26.26~22.04.1 | 6.2.0-26.26~22.04.1 |
| ubuntu/linux-ibm | <5.4.0-1053.58 | 5.4.0-1053.58 |
| ubuntu/linux-ibm | <6.2.0-1006.6 | 6.2.0-1006.6 |
| ubuntu/linux-ibm-5.4 | <5.4.0-1053.58~18.04.1 | 5.4.0-1053.58~18.04.1 |
| ubuntu/linux-iot | <5.4.0-1018.19 | 5.4.0-1018.19 |
| ubuntu/linux-kvm | <5.4.0-1095.101 | 5.4.0-1095.101 |
| ubuntu/linux-kvm | <6.2.0-1009.9 | 6.2.0-1009.9 |
| ubuntu/linux-lowlatency | <6.2.0-1009.9 | 6.2.0-1009.9 |
| ubuntu/linux-lowlatency-hwe-5.19 | <5.19.0-1030.30 | 5.19.0-1030.30 |
| ubuntu/linux-lowlatency-hwe-6.2 | <6.2.0-1009.9~22.04.1 | 6.2.0-1009.9~22.04.1 |
| ubuntu/linux-oem-6.0 | <6.0.0-1020.20 | 6.0.0-1020.20 |
| ubuntu/linux-oem-6.1 | <6.1.0-1019.19 | 6.1.0-1019.19 |
| ubuntu/linux-oracle | <5.4.0-1105.114 | 5.4.0-1105.114 |
| ubuntu/linux-oracle | <6.2.0-1008.8 | 6.2.0-1008.8 |
| ubuntu/linux-oracle-5.4 | <5.4.0-1105.114~18.04.1 | 5.4.0-1105.114~18.04.1 |
| ubuntu/linux-raspi | <5.4.0-1090.101 | 5.4.0-1090.101 |
| ubuntu/linux-raspi | <6.2.0-1009.11 | 6.2.0-1009.11 |
| ubuntu/linux-raspi-5.4 | <5.4.0-1090.101~18.04.1 | 5.4.0-1090.101~18.04.1 |
| ubuntu/linux-riscv | <6.2.0-27.28.1 | 6.2.0-27.28.1 |
| ubuntu/linux-xilinx-zynqmp | <5.4.0-1026.30 | 5.4.0-1026.30 |
| debian/linux | 4.19.249-2 4.19.304-1 5.10.209-2 5.10.205-2 6.1.76-1 6.1.85-1 6.6.15-2 6.7.12-1 |
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
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32629
- https://lists.ubuntu.com/archives/kernel-team/2023-July/140920.html
- https://wiz.io/blog/ubuntu-overlayfs-vulnerability
- https://ubuntu.com/security/notices/USN-6250-1
- http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html
- https://launchpad.net/bugs/cve/CVE-2023-32629
- https://security-tracker.debian.org/tracker/CVE-2023-32629
- https://ubuntu.com/security/notices/USN-6248-1
- https://ubuntu.com/security/notices/USN-6251-1
- https://ubuntu.com/security/notices/USN-6260-1
- https://ubuntu.com/security/notices/USN-6261-1
- https://ubuntu.com/security/notices/USN-6285-1
- https://www.cve.org/CVERecord?id=CVE-2023-32629
- https://nvd.nist.gov/vuln/detail/CVE-2023-32629
- https://git.kernel.org/linus/c914c0e27eb0843b7cf3bec71d6f34d53a3a671e
- https://git.kernel.org/linus/local-CVE-2023-2640-fix-1|local-CVE-2023-2640-fix-2
- https://git.kernel.org/linus/993a0b2aec52754f0897b1dab4c453be8217cae5
- https://git.kernel.org/linus/7109704705a4d80516de00779bba38b3844bff13
- https://ubuntu.com/security/CVE-2023-32629
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2023-32629?
CVE-2023-32629 is a local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels.
How severe is CVE-2023-32629?
CVE-2023-32629 has a severity rating of 7.8, which is considered high.
Which software versions are affected by CVE-2023-32629?
Ubuntu Linux version 23.04, Ubuntu Linux version 5.4.0-155.172 to version 6.2.0-26.26, and various other Ubuntu kernel versions are affected by CVE-2023-32629.
How can I fix CVE-2023-32629?
To fix CVE-2023-32629, update your Ubuntu kernel to the appropriate fixed version provided by Ubuntu or apply the necessary patches.
Where can I find more information about CVE-2023-32629?
You can find more information about CVE-2023-32629 on the MITRE CVE website, the Ubuntu kernel team mailing list, and the Ubuntu security notices.
- collector/nvd-latest
- collector/nvd-index
- agent/type
- agent/first-publish-date
- agent/last-modified-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/severity
- agent/remedy
- agent/weakness
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- agent/event
- agent/description
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/nvd-api
- agent/software-canonical-lookup-request
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/23.04
- package-manager/ubuntu
- package-manager/debian