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..This CVE has a CVSS3.1 score of 7.8 and a Base Severity of HIGH.
| Info | Details |
|---|---|
| CVE ID | CVE-2023-2640 |
| CVE State | PUBLISHED |
| BaseScore | 7.8 |
| BaseSeverity | HIGH |
| VectorString | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Version | NA |
References for CVE-2023-2640 :
https://ubuntu.com/security/notices/USN-6250-1
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640
https://wiz.io/blog/ubuntu-overlayfs-vulnerability
https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html
| Metric Type | Metric Score |
|---|---|
| AttackVector(AV) | LOCAL |
| AttackComplexity(AC) | LOW |
| PrivilegesRequired(PR) | LOW |
| UserInteraction(UI) | NONE |
| Scope(S) | UNCHANGED |
| Confidentiality(C) | HIGH |
| Availability(A) | HIGH |
| Integrity(I) | HIGH |