Security readout for executives and security teams
Plain-English summary
This issue affects certain Lenovo VIBE and China-only Moto phones running versions earlier than 6.0. A preinstalled app, Idea Friend, could let private data be backed up and restored through Android Debug Bridge, enabling tampering that may contribute to privilege escalation when combined with related Lenovo CVEs.
Executive priority
Treat this as a targeted legacy mobile-device risk. Prioritize if affected Lenovo phones remain in use, especially with sensitive data or debugging enabled. Broader urgency is reduced by age, limited affected products, and no cited active exploitation.
Technical view
CVE-2017-3749 concerns Android backup and restore behavior in Lenovo's Idea Friend application. The CVE record says private data can be backed up and restored through ADB, allowing tampering that leads to privilege escalation only in conjunction with CVE-2017-3748 and CVE-2017-3750.
Likely exposure
Exposure appears limited to Lenovo VIBE and Lenovo China-only Moto mobile phones earlier than version 6.0, especially where ADB or USB debugging access is available.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not marked KEV. The issue appears to require ADB backup and restore access and related CVEs for privilege escalation.
Researcher notes
Evidence is sparse: no CVSS, CWE, exploit details, or independent exploitation claims are provided. The key technical point is ADB-mediated backup and restore of private app data, with privilege escalation dependent on related Lenovo vulnerabilities.
Mitigation direction
- Identify affected Lenovo VIBE and China-only Moto devices earlier than version 6.0.
- Review Lenovo advisory LEN-15823 for supported remediation guidance.
- Move affected devices to vendor-supported firmware not earlier than 6.0 where available.
- Disable ADB or USB debugging except for controlled maintenance workflows.
- Retire unsupported affected phones from sensitive business use.
Validation and detection
- Inventory corporate mobile assets for Lenovo VIBE and China-only Moto models.
- Confirm device Android or firmware version is earlier than 6.0.
- Check whether the Idea Friend application is present on managed devices.
- Verify ADB and USB debugging are disabled by policy.
- Track related exposure to CVE-2017-3748 and CVE-2017-3750.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Privilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-3749 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://support.lenovo.com/us/en/product_security/LEN-15823CVE reference · x_refsource_CONFIRM
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.