CVE-2023-2640
Last modified
CVE-2023-2640 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.. EPSS estimates a 15.78% chance of exploitation in the next 30 days.
Description
On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Linux | 23.04 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640Third Party Advisory
- https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.htmlMailing List, Patch
- https://ubuntu.com/security/notices/USN-6250-1Vendor Advisory
- https://wiz.io/blog/ubuntu-overlayfs-vulnerabilityExploit, Mitigation, Third Party Advisory
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640Third Party Advisory
- https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.htmlMailing List, Patch
- https://ubuntu.com/security/notices/USN-6250-1Vendor Advisory
- https://wiz.io/blog/ubuntu-overlayfs-vulnerabilityExploit, Mitigation, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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