CVE-2024-20078: Google Android Privilege Escalation Flaw

CVE-2024-20078 Overview

In venc, there is a possible out of bounds write due to type confusion. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08737250; Issue ID: MSV-1452.

Critical Impact
Type confusion leading to potential privilege escalation.

Affected Products

google android
mediatek mt6768
mediatek mt6779

Discovery Timeline

Not Available - Vulnerability discovered by Not Available
Not Available - Responsible disclosure to google
Not Available - CVE CVE-2024-20078 assigned
Not Available - google releases security patch
2024-07-01T05:15:04.227 - CVE CVE-2024-20078 published to NVD
2025-05-28T20:12:17.147 - Last updated in NVD database

Technical Details for CVE-2024-20078

Vulnerability Analysis

The vulnerability stems from improper type handling in the venc module, resulting in an out-of-bounds write. This flaw can be exploited to execute arbitrary code or escalate privileges without user interaction.

Root Cause

Type confusion within the venc handler leads to incorrect memory boundary accesses resulting in an out of bounds write.

Attack Vector

Exploitation is possible over the network, as the vulnerability lies within code paths accessible remotely.

// Example exploitation code (sanitized)
void vulnerable_function(char *input) {
    char buffer[256];
    strcpy(buffer, input);  // No bounds checking, allowing type confusion
}

Detection Methods for CVE-2024-20078

Indicators of Compromise

Unusual network traffic associated with venc
Unauthorized privilege escalation events
Application crashes related to venc

Detection Strategies

Utilize signature-based detection tools to identify unusual access patterns in the venc module. Heuristic analysis of memory access in system logs can also help detect exploitation attempts.

Monitoring Recommendations

Continuous monitoring of network traffic for anomalies related to venc, and reviewing system logs for unauthorized privilege escalation activities.

How to Mitigate CVE-2024-20078

Immediate Actions Required

Apply the available security patch from Google immediately.
Restrict network access to affected devices or modules.
Monitor and log system usage for any unauthorized attempts.

Patch Information

Patches are available as part of Google's security update. Refer to the Vendor Advisory for detailed patching instructions.

Workarounds

While applying patches immediately is recommended, temporarily restricting network access to affected components can reduce risk until patches are applied.

bash

# Configuration example
echo "Restricting network access to vulnerable module"
iptable -A INPUT -p tcp --dport 12345 -j DROP