# CVE-2023-21508: Memory corruption in Samsung Blockchain Keystore

> A local attacker can execute arbitrary code via an out-of-bounds write in the Samsung Blockchain Keystore trustlet.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 May 2023
- **Updated:** 12 Feb 2025
- **Also known as:** GHSA-5jfx-mqq9-92pr

## What is CVE-2023-21508?

CVE-2023-21508 is a medium-severity memory corruption vulnerability in Samsung Blockchain Keystore, published on 4 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2023-21508?

It affects 1 product.


Products: Samsung Samsung Blockchain Keystore.

## How do I fix CVE-2023-21508?

No fix has been published for CVE-2023-21508 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-21508 being exploited?

There is no known exploitation of CVE-2023-21508 in the wild and no public exploit code.

## Other vulnerabilities in Samsung Blockchain Keystore

- [CVE-2023-21506](https://insights.sbomify.com/CVE-2023-21506/): Memory corruption in Samsung Blockchain Keystore (medium 6.7)
- [CVE-2023-21509](https://insights.sbomify.com/CVE-2023-21509/): Memory corruption in Samsung Blockchain Keystore (medium 6.7)
- [CVE-2023-21507](https://insights.sbomify.com/CVE-2023-21507/): Information disclosure in Samsung Blockchain Keystore (medium 4.4)
- [CVE-2023-21510](https://insights.sbomify.com/CVE-2023-21510/): Information disclosure in Samsung Blockchain Keystore (medium 4.4)
- [CVE-2023-21511](https://insights.sbomify.com/CVE-2023-21511/): Information disclosure in Samsung Blockchain Keystore (medium 4.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-21508 and fix it if it is affected.

What it is: CVE-2023-21508 is a medium-severity memory corruption vulnerability in Samsung Blockchain Keystore, published on 4 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-21508 in the wild and no public exploit code.

Affected product: Samsung Blockchain Keystore. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-21508/ (Markdown: https://insights.sbomify.com/CVE-2023-21508/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-21508
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-21508
- OSV: https://osv.dev/vulnerability/CVE-2023-21508

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-21508/
Summaries are generated and may contain mistakes; the official description above is the record.