Permissions, Privileges, and Access Controls in linux-image-6.2.0-1006-ibm (Ubuntu package) - CVE-2023-2640

Vulnerability identifier: #VU78673

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-2640

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: Public exploit is available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to missing permission checks for trusted.overlayfs.* xattrs". A local user can set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.

linux-image-6.2.0-1006-ibm (Ubuntu package)
linux (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-oracle-5.15 (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-generic-lpae-hwe-22.04 (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-5.19.0-50-generic-lpae (Ubuntu package)
linux-image-5.19.0-50-generic (Ubuntu package)
linux-image-5.19.0-50-generic-64k (Ubuntu package)
linux-image-5.19.0-1029-aws (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-5.19.0-1030-gcp (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-oem-22.04b (Ubuntu package)
linux-image-6.0.0-1020-oem (Ubuntu package)
linux-image-6.1.0-1019-oem (Ubuntu package)
linux-image-oem-22.04c (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-6.2.0-26-generic (Ubuntu package)
linux-image-6.2.0-26-generic-lpae (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-6.2.0-26-generic-64k (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-6.2.0-1008-aws (Ubuntu package)
linux-image-6.2.0-1008-azure (Ubuntu package)
linux-image-6.2.0-1008-oracle (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-6.2.0-1009-lowlatency (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-6.2.0-1009-kvm (Ubuntu package)
linux-image-6.2.0-1009-lowlatency-64k (Ubuntu package)
linux-image-6.2.0-1009-raspi (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-6.2.0-1010-gcp (Ubuntu package)
Ubuntu

Install updates from vendor's website.

linux-image-6.2.0-1006-ibm (Ubuntu package) - update to 6.2.0-1006.6
linux (Ubuntu package) - addressed in versions 5.15.0.177.103, 5.15.0.177.149, 5.15.0.177.162, 5.15.0-177.187+fips1, 5.15.0-177.187~20.04.1, 5.15.0-1047.47, 5.15.0.1047.49, 5.15.0-1058.58, 5.15.0.1089.88, 5.15.0-1089.97, 5.15.0.1098.94, 5.15.0-1098.100, 5.15.0.1098.102, 5.15.0-1098.103, 5.15.0.1100.96, 5.15.0-1100.103~20.04.1, 5.15.0.1101.100, 5.15.0.1101.101, 5.15.0-1101.102, 5.15.0-1101.107~20.04.1, 5.15.0.1102.101, 5.15.0-1102.108, 5.15.0.1103.99, 5.15.0-1103.109, 5.15.0.1105.109, 5.15.0-1105.114, 5.15.0.1106.96, 5.15.0.1106.102, 5.15.0.1106.109, 5.15.0-1106.113+fips1, 5.15.0-1106.113~20.04.1, 5.15.0-1106.115+fips1, 5.15.0.1111.96, 5.15.0.1111.109, 5.15.0-1111.120+fips1
linux-nvidia-tegra-5.15 (Ubuntu package) - addressed in versions 5.15.0-1058.58~20.04.1, 5.15.0.1100.98, 5.15.0-1100.103
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.15.0.1070.73, 5.15.0-1070.74
linux-oracle-5.15 (Ubuntu package) - update to 5.15.0-1104.110~20.04.1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1111.120~20.04.1
linux-image-virtual-hwe-22.04 (Ubuntu package) - update to 5.19.0.50.22
linux-image-generic-lpae-hwe-22.04 (Ubuntu package) - update to 5.19.0.50.22
linux-image-generic-hwe-22.04 (Ubuntu package) - update to 5.19.0.50.22
linux-image-generic-64k-hwe-22.04 (Ubuntu package) - update to 5.19.0.50.22
linux-image-5.19.0-50-generic-lpae (Ubuntu package) - update to 5.19.0-50.50
linux-image-5.19.0-50-generic (Ubuntu package) - update to 5.19.0-50.50
linux-image-5.19.0-50-generic-64k (Ubuntu package) - update to 5.19.0-50.50
linux-image-5.19.0-1029-aws (Ubuntu package) - update to 5.19.0-1029.30~22.04.1
linux-image-aws (Ubuntu package) - addressed in versions 5.19.0.1029.30~22.04.13, 6.2.0.1008.9
linux-image-5.19.0-1030-gcp (Ubuntu package) - update to 5.19.0-1030.32~22.04.1
linux-image-gcp (Ubuntu package) - addressed in versions 5.19.0.1030.32~22.04.2, 6.2.0.1010.10
linux-image-oem-22.04b (Ubuntu package) - update to 6.0.0.1020.20
linux-image-6.0.0-1020-oem (Ubuntu package) - update to 6.0.0-1020.20
linux-image-6.1.0-1019-oem (Ubuntu package) - update to 6.1.0-1019.19
linux-image-oem-22.04c (Ubuntu package) - update to 6.1.0.1019.19
linux-image-generic-64k (Ubuntu package) - update to 6.2.0.26.26
linux-image-generic (Ubuntu package) - update to 6.2.0.26.26
linux-image-6.2.0-26-generic (Ubuntu package) - update to 6.2.0-26.26
linux-image-6.2.0-26-generic-lpae (Ubuntu package) - update to 6.2.0-26.26
linux-image-generic-lpae (Ubuntu package) - update to 6.2.0.26.26
linux-image-virtual (Ubuntu package) - update to 6.2.0.26.26
linux-image-6.2.0-26-generic-64k (Ubuntu package) - update to 6.2.0-26.26
linux-image-ibm (Ubuntu package) - update to 6.2.0.1006.6
linux-image-azure (Ubuntu package) - update to 6.2.0.1008.8
linux-image-6.2.0-1008-aws (Ubuntu package) - update to 6.2.0-1008.8
linux-image-6.2.0-1008-azure (Ubuntu package) - update to 6.2.0-1008.8
linux-image-6.2.0-1008-oracle (Ubuntu package) - update to 6.2.0-1008.8
linux-image-oracle (Ubuntu package) - update to 6.2.0.1008.8
linux-image-lowlatency (Ubuntu package) - update to 6.2.0.1009.9
linux-image-6.2.0-1009-lowlatency (Ubuntu package) - update to 6.2.0-1009.9
linux-image-lowlatency-64k (Ubuntu package) - update to 6.2.0.1009.9
linux-image-kvm (Ubuntu package) - update to 6.2.0.1009.9
linux-image-6.2.0-1009-kvm (Ubuntu package) - update to 6.2.0-1009.9
linux-image-6.2.0-1009-lowlatency-64k (Ubuntu package) - update to 6.2.0-1009.9
linux-image-6.2.0-1009-raspi (Ubuntu package) - update to 6.2.0-1009.11
linux-image-raspi (Ubuntu package) - update to 6.2.0.1009.12
linux-image-raspi-nolpae (Ubuntu package) - update to 6.2.0.1009.12
linux-image-6.2.0-1010-gcp (Ubuntu package) - update to 6.2.0-1010.10

• Exploit #10993 - GameOver(lay) Privilege Escalation and Container Escape (December 18, 2024)
• Exploit #9585 - CVE-2023-2640-CVE-2023-32629 (GameOver(lay) Ubuntu Privilege Escalation) (March 4, 2024)
• Exploit #9330 - GameOverlayFS (GameoverlayFS (CVE-2023-2640 and CVE-2023-32629) exploit in Shell Script tested on Ubuntu 20.04 Kernel 5.4.0) (September 18, 2023)

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640
• https://ubuntu.com/security/notices/USN-6250-1
• https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html
• https://wiz.io/blog/ubuntu-overlayfs-vulnerability
• https://www.zerodayinitiative.com/advisories/ZDI-23-1009/

• Ubuntu update for linux-oem-6.0
• Ubuntu update for linux
• Ubuntu update for linux-aws-5.19
• Ubuntu update for linux-oem-6.1
• Ubuntu update for linux
• Ubuntu update for linux-azure-5.15
• Ubuntu update for linux-xilinx-zynqmp
• Ubuntu update for linux-nvidia-tegra-5.15
• Ubuntu update for linux-oracle-5.15