CVE-2010-2525 – CVE-2010-2525 is a privilege escalation vulnera... (How to Fix)

Q: What is the severity of CVE-2010-2525?

CVE-2010-2525 has a CVSS score of 7.8 (HIGH). CVE-2010-2525 is a privilege escalation vulnerability in the GFS2 file system's ACL handling. An unprivileged local attacker can exploit this flaw to gain unauthorized access or execute any file on the GFS2 file system. This affects Linux systems using GFS2 with ACLs enabled.

📋 TL;DR

CVE-2010-2525 is a privilege escalation vulnerability in the GFS2 file system's ACL handling. An unprivileged local attacker can exploit this flaw to gain unauthorized access or execute any file on the GFS2 file system. This affects Linux systems using GFS2 with ACLs enabled.

💻 Affected Systems

Products:

Linux Kernel GFS2 file system

Versions: Linux kernel versions before 2.6.35

Operating Systems: Linux distributions using affected kernel versions

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects systems using GFS2 file system with ACLs enabled. Most standard Linux installations do not use GFS2 by default.

📦 What is this software?

Linux Kernel by Linux

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⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise where an unprivileged user gains root access to all files on the GFS2 file system, potentially leading to data theft, modification, or destruction.

🟠

Likely Case

Local privilege escalation allowing an attacker to read sensitive files, modify system files, or execute arbitrary code with elevated privileges.

🟢

If Mitigated

Limited impact if proper access controls, network segmentation, and monitoring are in place to detect and prevent unauthorized local access.

🌐 Internet-Facing: LOW - This is a local privilege escalation vulnerability requiring local system access.

🏢 Internal Only: HIGH - Any internal user with local access to affected systems can potentially exploit this vulnerability.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploitation requires local access to the system. The vulnerability is well-documented and patches have been available since 2010.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Linux kernel 2.6.35 and later

Vendor Advisory: https://ubuntu.com/security/CVE-2010-2525

Restart Required: Yes

Instructions:

1. Update Linux kernel to version 2.6.35 or later. 2. For Ubuntu systems: sudo apt-get update && sudo apt-get install linux-image-generic. 3. Reboot the system to load the new kernel.

🔧 Temporary Workarounds

Disable GFS2 ACL support

linux

Temporarily disable ACL support on GFS2 file systems to mitigate the vulnerability

mount -o remount,noacl /path/to/gfs2/mountpoint

Restrict local access

all

Limit local user access to systems using GFS2 file systems

🧯 If You Can't Patch

Implement strict access controls to limit local user access to affected systems
Monitor system logs for unauthorized access attempts and privilege escalation activities

🔍 How to Verify

Check if Vulnerable:

Check kernel version: uname -r. If version is earlier than 2.6.35 and GFS2 is in use, system is vulnerable.

Check Version:

uname -r

Verify Fix Applied:

Verify kernel version is 2.6.35 or later: uname -r. Check that GFS2 file systems are mounted with proper ACL handling.

📡 Detection & Monitoring

Log Indicators:

Failed privilege escalation attempts
Unauthorized file access in GFS2 file systems
ACL modification logs

Network Indicators:

None - this is a local vulnerability

SIEM Query:

source="kernel" AND ("GFS2" OR "ACL") AND ("permission denied" OR "access violation")

📊 Metadata

CVE ID: CVE-2010-2525

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-863

Published: June 22, 2021

Last Updated: November 21, 2024

🔗 References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2646a1f61a3b5525914757f10fa12b5b94713648 Mailing List,Patch,Vendor Advisory
https://ubuntu.com/security/CVE-2010-2525 Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2646a1f61a3b5525914757f10fa12b5b94713648 Mailing List,Patch,Vendor Advisory
https://ubuntu.com/security/CVE-2010-2525 Third Party Advisory

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🔗 Related Vulnerabilities

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