Security readout for executives and security teams
Plain-English summary
CVE-2018-9471 is an Android system-server privilege escalation issue tied to NanoAppFilter deserialization. The source says exploitation requires no user interaction and no additional execution privileges. A successful attack could give higher local control on affected Android systems, making old or unpatched Android 7 through 9 devices the main concern.
Executive priority
Treat this as high priority for legacy Android fleets because the impact is system-level privilege escalation. Urgency depends on whether affected Android versions remain in production and whether vendor patches are confirmed.
Technical view
The issue is described as type confusion and possible data loss in the deserialization constructor of NanoAppFilter.java. Sources state it can lead to local escalation of privilege in system_server. The bundle lists Android 7, 8, 8.1, 9, and related nyc dev branches as affected.
Likely exposure
Exposure is most likely on Android devices or derived builds still running affected Android 7, 8, 8.1, or 9 versions without the relevant September 2018 security bulletin fixes.
Exploitation context
The bundle does not cite active exploitation, and KEV status is false. The described attack path is local privilege escalation without user interaction, but the provided sources do not include exploit availability or operational details.
Researcher notes
Evidence is limited to the CVE description, Android bulletin reference, affected version list, and CVSS data. Do not infer exploit availability. Focus validation on affected Android branches, patch provenance, and whether downstream device vendors incorporated the bulletin fixes.
Mitigation direction
- Inventory Android 7, 8, 8.1, and 9 devices.
- Check vendor or carrier guidance for the September 2018 Android security bulletin.
- Apply available Android security updates for affected devices.
- Retire or isolate devices that cannot receive vendor-supported fixes.
- Limit sensitive access from unsupported Android devices.
Validation and detection
- Confirm each device Android version and security patch level.
- Verify vendor firmware includes September 2018 Android security bulletin fixes.
- Review MDM inventory for unsupported or unmanaged Android devices.
- Track exceptions where vendor fix status cannot be confirmed.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2018-9471 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2018-09-01CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.