Play Services SDK: Modification of Assumed-Immutable Data (MAID)
CVE-2022-2390 is a high-severity modification of assumed-immutable data (MAID) vulnerability in Play Services SDK from Google, with a CVSS 3.1 base score of 8.4 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists version 18.0.2 as the first without the flaw, so updating Play Services SDK to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.11% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Play Services SDK to 18.0.2 or a later version.
- Update Google Play Services Software Development Kit to 18.0.2 or a later version.
- Read the advisory on developers.google.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Play Services SDK | before 18.0.2 | 18.0.2 | |
| Google Play Services Software Development Kit | before 18.0.2 | 18.0.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.1 | Medium | CNA (google.com) |
| CVSS 3.1 | 8.4 | High | NVD |
Official description
Apps developed with Google Play Services SDK incorrectly had the mutability flag set to PendingIntents that were passed to the Notification service. As Google Play services SDK is so widely used, this bug affects many applications. For an application affected, this bug will let the attacker, gain the access to all non-exported providers and/or gain the access to other providers the victim has permissions. We recommend upgrading to version 18.0.2 of the Play Service SDK as well as rebuilding and redeploying apps.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Modification of Assumed-Immutable Data (MAID)
The product does not properly protect an assumed-immutable element from being modified by an attacker.
How developers prevent this class of flaw
- When the data is stored or transmitted through untrusted sources that could modify the data, implement integrity checks to detect unauthorized modification, or store/transmit the data in a trusted location that is free from external influence.
More Modification of Assumed-Immutable Data (MAID) vulnerabilities (CWE-471)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- mvnrepository.com/artifact/com.google.android.gms/play-services-basement/18.0.2Third Party Advisory
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