How the Mentioned CVE Works:
CVE-2025-20626 is a critical use-after-free vulnerability in OpenHarmony v5.0.2 and prior versions. This flaw allows a local attacker to execute arbitrary code in pre-installed applications by exploiting a memory corruption issue. The vulnerability occurs when the system fails to properly clear a pointer after freeing the associated memory, enabling an attacker to manipulate the freed memory space. This can lead to unauthorized code execution in restricted scenarios, potentially compromising the device’s security. The exploit requires specific conditions, such as access to the local system and knowledge of the memory layout, making it challenging but highly dangerous if successfully exploited.
DailyCVE Form:
Platform: OpenHarmony
Version: v5.0.2 and prior
Vulnerability: Use-After-Free
Severity: Critical
Date: 03/03/2025
(End of form)
What Undercode Say:
Analytics:
- CVSS Score: 9.1 (Critical)
- Attack Vector: Local
- Exploitability: Low (requires specific conditions)
- Impact: High (arbitrary code execution)
Commands:
1. Check OpenHarmony version:
uname -a
2. List pre-installed apps:
pm list packages -f
Exploit Details:
- Exploit Code:
// Sample exploit code for educational purposes void exploit() { char ptr = malloc(100); free(ptr); ptr = 'A'; // Use-after-free }
Protection Measures:
1. Update OpenHarmony to the latest version.
2. Apply patches provided by OpenHarmony.
3. Restrict local access to untrusted users.
4. Use memory sanitizers to detect use-after-free vulnerabilities.
References:
Additional Tools:
- GDB: Debug memory corruption issues.
- Valgrind: Detect memory leaks and use-after-free errors.
- ASAN (AddressSanitizer): Identify memory-related vulnerabilities.
Mitigation Script:
Check for vulnerable OpenHarmony versions if [[ $(uname -r) == "5.0.2" ]]; then echo "Vulnerable system detected. Update immediately." else echo "System is not vulnerable." fi
By following these steps, users can mitigate the risks associated with CVE-2025-20626 and protect their systems from potential exploitation.
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-20626
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