Public exploit available
Public proof-of-concept or exploit code exists (ExploitDB / Metasploit / Nuclei).
CVE-2023-2640 — Incorrect Authorization in Ubuntu Linux
Severity
7.8HIGHNVD
EPSS
91.5%
top 0.33%
CISA KEV
Not in KEV
Exploit
PoC available
Public exploit / PoC exists
Affected products
Timeline
PublishedJul 26
Latest updateAug 11
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages0 packages
Also affects: Ubuntu Linux 23.04
Patches
🔴Vulnerability Details
6GHSA▶
GHSA-38f7-vv5r-859m: On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted↗2023-07-26
CVEList▶
CVE-2023-2640: On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted↗2023-07-26
OSV▶
CVE-2023-2640: On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted↗2023-06-06
💥Exploits & PoCs
1Nuclei▶
GameOver(lay) - Local Privilege Escalation in Ubuntu Kernel