Google Android EXT4 File System use after free

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.
5.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Google Android. This impacts an unknown function of the component EXT4 File System. Performing a manipulation results in use after free. This vulnerability is known as CVE-2018-10876. Attacking locally is a requirement. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Google Android (Smartphone Operating System) (affected version unknown). It has been classified as critical. This affects an unknown functionality of the component EXT4 File System. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in Linux kernel in the ext4 filesystem code. A use-after-free is possible in ext4_ext_remove_space() function when mounting and operating a crafted ext4 image.

The bug was discovered 06/14/2018. The weakness was published 01/07/2019 by ERNE as Android Security Bulletin - January 2019 as confirmed security bulletin (Website). The advisory is shared at source.android.com. This vulnerability is uniquely identified as CVE-2018-10876 since 05/09/2018. An attack has to be approached locally. The successful exploitation needs a authentication. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 42 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 117800 (SUSE SLES12 Security Update : kernel (SUSE-SU-2018:2858-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171490 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2018:2776-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117800) and SecurityFocus (BID 106009†). Similar entries are available at VDB-120200, VDB-120201, VDB-120202 and VDB-121903. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.0
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 117800
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2018:2858-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

05/09/2018 🔍
06/14/2018 +36 days 🔍
07/26/2018 +42 days 🔍
09/27/2018 +63 days 🔍
11/24/2018 +58 days 🔍
01/05/2019 +42 days 🔍
01/07/2019 +2 days 🔍
02/04/2019 +28 days 🔍
07/04/2023 +1611 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: Android Security Bulletin - January 2019
Researcher: ERNE
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-10876 (🔍)
GCVE (CVE): GCVE-0-2018-10876
GCVE (VulDB): GCVE-100-130425
SecurityFocus: 106009 - Linux Kernel CVE-2018-16862 Local Security Bypass Vulnerability

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

Entryinfo

Created: 02/04/2019 08:45
Updated: 07/04/2023 13:36
Changes: 02/04/2019 08:45 (66), 05/07/2020 16:06 (15), 07/04/2023 13:31 (4), 07/04/2023 13:36 (11)
Complete: 🔍
Cache ID: 216:D58:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!