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CVE Record

CVE-2018-9487: In setVpnForcedLocked of Vpn.java, there is a possible blocking of internet traffic through vpn due to a ba...

In setVpnForcedLocked of Vpn.java, there is a possible blocking of internet traffic through vpn due to a bad uid check. This could lead to local denial of service with no additional execution privileges needed. User interaction is needed for exploitation.

MediumCVSS 6.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Android flaw can let a user-assisted action block internet traffic that should pass through VPN handling. The reported impact is denial of service, not data theft or system takeover. It affects Android 8, 8.1, and 9 according to the source bundle.

Executive priority

Treat as a moderate availability issue. It is unlikely to justify emergency response by itself, but it matters for fleets where VPN availability is business-critical or required for secure access.

Technical view

CVE-2018-9487 is in Android Vpn.java, setVpnForcedLocked. A bad UID check may cause VPN-related internet traffic blocking. The CVSS 3.1 score is 6.5 with high availability impact, no confidentiality or integrity impact, and user interaction required.

Likely exposure

Exposure is limited to Android 8, 8.1, and 9 devices lacking the relevant Android security bulletin fixes. Business risk is higher where VPN connectivity is required for operations, compliance, or remote access.

Exploitation context

The bundle does not cite active exploitation, and KEV is false. Exploitation requires user interaction. The description says local denial of service, while the CVSS vector lists network attack vector; treat this as an evidence inconsistency.

Researcher notes

Sources provide affected versions, function location, impact type, CVSS, and Android bulletin reference. They do not provide CWE, exploit details, or named mitigations beyond vendor bulletin context. Avoid claiming exploitation or broader affected products.

Mitigation direction

  • Confirm affected devices have the Android 2018-09-01 security bulletin fixes.
  • Prioritize updates for Android 8, 8.1, and 9 devices using managed VPN.
  • Check OEM or carrier guidance where Android patch levels vary.
  • Retire or isolate unsupported affected devices that cannot receive updates.
  • Monitor helpdesk and MDM events for unusual VPN traffic blocking.

Validation and detection

  • Inventory Android fleet versions and security patch levels.
  • Identify devices running Android 8, 8.1, or 9.
  • Confirm whether the September 2018 Android security bulletin is applied.
  • Review MDM VPN lockdown policies for affected device groups.
  • Test VPN connectivity on patched representative devices in a controlled environment.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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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CVE-2018-9487 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
6.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H2.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2018-9487Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GoogleAndroid8, 8.1, 9unaffected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.