Google Android up to 4.4.3/5.0.1/5.1.0 Debuggerd access control

CVSS Meta Temp Score
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CTI Interest Score
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7.5$5k-$25k0.00

Summaryinfo

A vulnerability was found in Google Android up to 4.4.3/5.0.1/5.1.0. It has been rated as critical. Affected by this issue is some unknown functionality of the component Debuggerd. The manipulation leads to access control. This vulnerability is traded as CVE-2016-2420. An attack has to be approached locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Google Android up to 4.4.3/5.0.1/5.1.0 (Smartphone Operating System) and classified as critical. This issue affects an unknown function of the component Debuggerd. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

rootdir/init.rc in Android 4.x before 4.4.4 does not ensure that the /data/tombstones directory exists for the Debuggerd component, which allows attackers to gain privileges via a crafted application, aka internal bug 26403620.

The weakness was shared 04/04/2016 as ANDROID-26403620 as confirmed security bulletin (Website). It is possible to read the advisory at source.android.com. The identification of this vulnerability is CVE-2016-2420 since 02/18/2016. Attacking locally is a requirement. The successful exploitation requires a simple authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/03/2019). It is expected to see the exploit prices for this product increasing in the near future.The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 90 days. During that time the estimated underground price was around $25k-$100k.

Upgrading to version 4.4.4, 5.0.2, 5.1.1, 6.0 or 6.0.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Vulnerability Center (SBV-57900†). The entries VDB-81567, VDB-81568, VDB-81569 and VDB-81570 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Android 4.4.4/5.0.2/5.1.1/6.0/6.0.1

Timelineinfo

01/05/2016 🔍
02/18/2016 +44 days 🔍
04/04/2016 +46 days 🔍
04/04/2016 +0 days 🔍
04/04/2016 +0 days 🔍
04/05/2016 +1 days 🔍
04/05/2016 +0 days 🔍
04/17/2016 +11 days 🔍
02/03/2019 +1022 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: ANDROID-26403620
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2420 (🔍)
GCVE (CVE): GCVE-0-2016-2420
GCVE (VulDB): GCVE-100-81599
Vulnerability Center: 57900 - Google Android 4.4.4, 5.0.2, 5.1.1, 6.0 and 6.0.1 before 2016-04-02 Remote Privilege Escalation in Debuggerd Component, Critical

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

Entryinfo

Created: 04/05/2016 09:13
Updated: 02/03/2019 10:43
Changes: 04/05/2016 09:13 (64), 02/03/2019 10:43 (10)
Complete: 🔍
Cache ID: 216::103

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