Google Android 5.0/5.1 libstagefright MP3/MP4 File input validation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.1	$5k-$25k	0.00

A vulnerability has been found in Google Android 5.0/5.1 (Smartphone Operating System) and classified as critical. This vulnerability affects some unknown processing of the component libstagefright. The manipulation as part of a MP3/MP4 File leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

libstagefright in Android through 5.1.1 LMY48M allows remote attackers to execute arbitrary code via crafted metadata in a (1) MP3 or (2) MP4 file.

The weakness was released 10/01/2015 by Joshua J. Drake with Zimperium Mobile Security Labs as New Vulnerability Processing MP3/MP4 Media as confirmed advisory (Blog). The advisory is shared for download at blog.zimperium.com. This vulnerability was named CVE-2015-3876 since 05/12/2015. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. Technical details are unknown but a private exploit is available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 47 days. During that time the estimated underground price was around $100k and more. The advisory illustrates:

The vulnerability lies in the processing of metadata within the files, so merely previewing the song or video would trigger the issue. Since the primary attack vector of MMS has been removed in newer versions of Google’s Hangouts and Messenger apps, the likely attack vector would be via the Web browser.

Upgrading to version 5.1.1 eliminates this vulnerability. The advisory contains the following remark:

At the heart of all Zimperium technology is our z9 engine, which has been trained with the capability to detect media processing attacks through all attack vectors. No additional update is required to detect this new pair of vulnerabilities. We are diligently monitoring sources for in-the-wild attacks.

The vulnerability is also documented in the vulnerability database at X-Force (106876). Entries connected to this vulnerability are available at 78187 and 78197.

Productinfo

Type

Smartphone Operating System

Vendor

Google

Name

Android

Version

License

free

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 8.1

VulDB Base Score: 9.3
VulDB Temp Score: 8.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Android 5.1.1
Fortigate IPS: 🔍

Timelineinfo

05/12/2015 🔍
08/15/2015 +95 days 🔍
10/01/2015 +47 days 🔍
10/01/2015 +0 days 🔍
10/01/2015 +0 days 🔍
10/02/2015 +1 days 🔍
10/04/2015 +2 days 🔍
10/05/2015 +1 days 🔍
10/06/2015 +1 days 🔍
02/03/2018 +851 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: New Vulnerability Processing MP3/MP4 Media
Researcher: Joshua J. Drake
Organization: Zimperium Mobile Security Labs
Status: Confirmed

CVE: CVE-2015-3876 (🔍)
X-Force: 106876 - Google Android libstagefright code execution
SecurityTracker: 1033725
Vulnerability Center: 53231 - Google Android before 5.1.1 LMY48T Remote Code Execution Vulnerability in libstagefright via Crafted MP3 or MP4 File, Critical
SecurityFocus: 76940 - Google Android libstagefright CVE-2015-3876 Arbitrary Code Execution Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 10/04/2015 10:59
Updated: 02/03/2018 10:29
Changes: 10/04/2015 10:59 (70), 02/03/2018 10:29 (10)
Complete: 🔍