CVE-2023-2640 PoC — Canonical Ubuntu Linux 安全漏洞

Source

https://github.com/K5LK/CVE-2023-2640-32629

Associated Vulnerability

Title: Canonical Ubuntu Linux 安全漏洞 (CVE-2023-2640)
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.

Readme

# Ubuntu Privilege Escalation: CVE-2023-2640 and CVE-2023-32629

This is a local privilege escalation vulnerability affecting certain Ubuntu kernels. It allows unprivileged users to set privileged extended attributes on mounted files, bypassing security checks and potentially gaining elevated privileges. Two CVEs, CVE-2023-2640 and CVE-2023-32629, are associated with this vulnerability. The affected kernels include versions 6.2.0, 5.19.0, and 5.4.0, across various Ubuntu releases. It's crucial to apply patches provided by Ubuntu promptly and follow security best practices to mitigate these vulnerabilities.

## Usage

1. Make the script executable:
```bash
chmod +x poc.sh
```
2. Run the script:
```bash
./poc.sh
```
## Demo

[![Demo Video](https://img.youtube.com/vi/Up5q-FLWNk4/0.jpg)](https://www.youtube.com/watch?v=Up5q-FLWNk4)

File Snapshot

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

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