CVE intelligence and bounded remediation

CVE-2019-2023 — In ServiceManager::add function in the hardware service manager, there is an insecure permissions check based on the PID of the caller

High CVSS 7.8

In ServiceManager::add function in the hardware service manager, there is an insecure permissions check based on the PID of the caller. This could allow an app to add or replace a HAL service with its own service, gaining code execution in a privileged process.Product: AndroidVersions: Android-8.0 Android-8.1 Android-9Android ID: A-121035042Upstream kernel

Severity
High
CVSS
7.8 (3.0)
Published
2019-06-19
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-732

Affected products

  • google / android / 8.0
  • google / android / 8.1
  • google / android / 9.0

Matched remediation archetype

Privilege escalation and unsafe privilege management

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Check exposure

  • Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
  • Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
  • Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.

Remediate safely

  • Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
  • Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
  • Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.

Authoritative sources

Complete CVE record and remediation plan

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