Security readout for executives and security teams
Plain-English summary
This Android flaw could let a local app or user bypass VPN-only network restrictions. For organizations relying on Android VPN enforcement to protect sensitive traffic, the business risk is data leaving the intended protected tunnel. The source bundle does not show active exploitation or public weaponization.
Executive priority
Prioritize remediation for enterprise Android fleets where VPN controls protect regulated, customer, or internal traffic. This is not internet-runnable, but it can undermine a core mobile data-protection control if affected devices remain in use.
Technical view
CVE-2017-13314 is a missing permission check in Android NetworkManagementService.setAllowOnlyVpnForUids. With local low privileges and no user interaction, an attacker could bypass security settings intended to restrict UIDs to VPN networks. The CVSS v3.1 score is 7.8 high, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely on Android 7, 8, 8.1, and listed nyc-mr development branches that lack the relevant Google security bulletin fix. Risk is higher where enterprise policy depends on always-on or per-app VPN isolation.
Exploitation context
The provided sources describe local privilege escalation and VPN restriction bypass, requiring low privileges and no user interaction. KEV is false, and the bundle provides no evidence of active exploitation. Treat exploitation status as unconfirmed, not active.
Researcher notes
The source bundle identifies the vulnerable method, impact, affected Android versions, CVSS vector, and Google bulletin reference. It does not provide patch build identifiers, exploit samples, observed exploitation, or detailed detection telemetry. Avoid claiming active exploitation without additional cited evidence.
Mitigation direction
- Review Google Android Security Bulletin 2018-05-01 for vendor fix guidance.
- Update affected Android devices to supported patched builds.
- Prioritize managed devices using always-on or per-app VPN controls.
- Retire or isolate unsupported Android 7, 8, or 8.1 devices.
- Verify MDM compliance policies require current Android security patch levels.
Validation and detection
- Inventory Android device versions across managed and unmanaged fleets.
- Compare device security patch levels with Google bulletin guidance.
- Identify devices enforcing VPN-only or per-app VPN network controls.
- Confirm unsupported affected versions are removed, isolated, or risk-accepted.
- Review MDM reports for policy drift around VPN enforcement.
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
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2017-13314 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2018-05-01CVE 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.
Incorrect Default Permissions
Incorrect Default Permissions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.