Google Android binder_alloc.c binder_alloc_free_page double free

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Google Android. Affected by this issue is the function binder_alloc_free_page of the file binder_alloc.c. This manipulation causes double free. This vulnerability is registered as CVE-2019-1999. The attack needs to be launched locally. Furthermore, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as critical was found in Google Android (Smartphone Operating System) (the affected version is unknown). Affected by this vulnerability is the function binder_alloc_free_page of the file binder_alloc.c. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In binder_alloc_free_page of binder_alloc.c, there is a possible double free due to improper locking. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android kernel. Android ID: A-120025196.

The bug was discovered 11/23/2018. The weakness was published 02/28/2019 as A-120025196 (Website). It is possible to read the advisory at source.android.com. This vulnerability is known as CVE-2019-1999 since 12/10/2018. Attacking locally is a requirement. A single authentication is needed for exploitation. Technical details and also a public exploit are known.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 97 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 247805 (Linux Distros Unpatched Vulnerability : CVE-2019-1999), which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197461 (Ubuntu Security Notification for Linux, Linux-aws, Linux-azure, Linux-gcp, Linux-kvm, Linux-raspi2 Vulnerabilities (USN-3979-1)).

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at Tenable (247805) and SecurityFocus (BID 108142†). Similar entries are available at VDB-131264, VDB-131265, VDB-131266 and VDB-131267. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.8
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 247805
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2019-1999

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/23/2018 🔍
12/10/2018 +17 days 🔍
02/28/2019 +80 days 🔍
03/01/2019 +1 days 🔍
05/02/2019 +62 days 🔍
08/11/2025 +2293 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: A-120025196
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-1999 (🔍)
GCVE (CVE): GCVE-0-2019-1999
GCVE (VulDB): GCVE-100-131275
SecurityFocus: 108142 - Linux Kernel CVE-2019-11683 Remote Denial of Service Vulnerability

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

Entryinfo

Created: 03/01/2019 08:33
Updated: 08/11/2025 05:40
Changes: 03/01/2019 08:33 (65), 05/13/2020 11:58 (4), 07/26/2023 09:11 (4), 06/06/2024 05:25 (22), 08/11/2025 05:40 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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