CVE-2023-32629

Published on: Not Yet Published

Last Modified on: 09/11/2023 07:15:00 PM UTC

CVE-2023-32629

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

Certain versions of Ubuntu Linux from Canonical contain the following vulnerability:

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

CVE-2023-32629 has been assigned by secu[email protected] to track the vulnerability - currently rated as HIGH severity.
Affected Vendor/Software: Canonical - Ubuntu Kernel version not down converted

Vulnerability Patch/Work Around

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

CVSS3 Score: 7.8 - HIGH

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

CVE References

Description	Tags ^ⓘ	Link
Kernel Live Patch Security Notice LSN-0097-1 ≈ Packet Storm	packetstormsecurity.com text/html	MISC packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html
[SRU Focal 1/1] ovl: adhere to the vfs_ vs. ovl_do_ conventions for xattrs	lists.ubuntu.com text/x-diff	MISC lists.ubuntu.com/archives/kernel-team/2023-July/140920.html
Page not found \| Wiz	wiz.io text/html Inactive LinkNot Archived	MISC wiz.io/blog/ubuntu-overlayfs-vulnerability
CVE - CVE-2023-32629	cve.mitre.org text/xml	MISC cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32629
USN-6250-1: Linux kernel vulnerabilities \| Ubuntu security notices \| Ubuntu	ubuntu.com text/html	MISC ubuntu.com/security/notices/USN-6250-1

By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].

Related QID Numbers

199608 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6250-1)
199610 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6248-1)
199613 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6251-1)
199618 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6260-1)
199623 Ubuntu Security Notification for Linux kernel (IoT) Vulnerabilities (USN-6261-1)
199651 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6285-1)

Known Affected Configurations (CPE V2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Operating System	Canonical	Ubuntu Linux	23.04	All	All	All

cpe:2.3:o:canonical:ubuntu_linux:23.04:*:*:*:*:*:*:*:

No vendor comments have been submitted for this CVE

Social Mentions

Source	Title	Posted (UTC)
/r/pop_os	Is PopOS vulnerable to CVE-2023-2640 and CVE-2023-32629	2023-07-27 06:32:03
/r/sysadmin	GameOver(lay): Easy-to-exploit local privilege escalation vulnerabilities in Ubuntu Linux affect 40% of Ubuntu cloud workloads	2023-07-27 15:42:28
/r/cybersecurity	Top cybersecurity stories for the week of 07-24-23 to 07-28-23	2023-07-28 13:59:45
/r/KibernetinisSaugumas	Ubuntu branduolio pažeidžiamumai kelia grėsmę milijonams naudotojų	2023-07-28 10:37:11
/r/selfhosted	Ubuntu Local Privilege Escalation (CVE-2023-2640 & CVE-2023-32629)	2023-07-31 10:46:42
/r/Action1	Patch Tuesday August 2023	2023-08-08 17:42:04