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GoogleOSV:ASB-A-172935267

HistoryFeb 01, 2021 - 12:00 a.m.

getContentProviderImpl returns without Binder.restoreCallingIdentity, allowing starting any activities

2021-02-0100:00:00

Google

osv.dev

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.0004 Low

EPSS

Percentile

5.3%

JSON

In getContentProviderImpl of ActivityManagerService.java, there is a possible permission bypass due to non-restored binder identities. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CPENameOperatorVersion
platform/frameworks/baseeq8.1
platform/frameworks/baseeq8.0
platform/frameworks/baseeq11
platform/frameworks/baseeq10
platform/frameworks/baseeq9

Name	Operator	Version
platform/frameworks/base	eq	8.1
platform/frameworks/base	eq	8.0
platform/frameworks/base	eq	11
platform/frameworks/base	eq	10
platform/frameworks/base	eq	9

References

android.googlesource.com/platform/frameworks/base/+/69eaa90b0e4cc78fa2f518a50182bc9e4c9e87f3

source.android.com/security/bulletin/2021-02-01

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.0004 Low

EPSS

Percentile

5.3%

JSON

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